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Unit 5

Equations for Functions

Functions and Volume

Lesson 3

8.F.A: Define, evaluate, and compare functions.

8.F.A.1: Understand that a function is a rule that assigns to each input exactly one output. The graph of a function is the set of ordered pairs consisting of an input and the corresponding output.

Expressions and Equations

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A Square’s Area

Unit 5 ā— Lesson 3

1 min individual - 1 min team share - 3 mins class share

Page 117

S²

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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A Square’s Area

Unit 5 ā— Lesson 3

1 min individual - 1 min team share - 3 mins class share

Page 117

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Let’s find outputs from equations.

Unit 5 ā— Lesson 3

We will be able to find the output of a function when we know the input so that we can name the independent and dependent variables for a given function and represent the function with an equation.

Learning

Goal

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Where were we? Where are we? Where are we going?

Unit 5 ā— Lesson 3

Agenda Review

You are successful today when...,

  • You can find the output of a function when you know the input.
  • You can name the independent and dependent variables for a given function and represent the function with an equation.

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Glossary

Unit 5 ā— Lesson 3

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Glossary

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.2 Activity: Diagrams, Equations, and Descriptions

I can find the output of a function when I know the input.

15 mins total

3 mins individual - 5 mins group - 5 minutes class

Record your answers to these questions in the table provided

pg 118

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.2 Activity: Diagrams, Equations, and Descriptions

I can find the output of a function when I know the input.

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.2 Activity: Diagrams, Equations, and Descriptions

I can find the output of a function when I know the input.

  1. C = 2šž¹r
  2. d = 60t
  3. y = 3x - 4
  4. v = s³
  • _________
  • _________
  • _________
  • _________

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.2 Activity: Diagrams, Equations, and Descriptions

I can find the output of a function when I know the input.

  • C = 2šž¹ā¦5 = 10šž¹ ā‰ˆ 31.4
  • d = 60⦁5 = 300
  • y = 3⦁5 - 4 = 11
  • v = 5³ = 125
  • C = 2šž¹ā¦5 = ___
  • d = 60⦁5 = ___
  • y = 3⦁5 - 4 = ___
  • v = 5³ = ___

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.2 Activity: Diagrams, Equations, and Descriptions

I can find the output of a function when I know the input.

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.2 Activity: Diagrams, Equations, and Descriptions

I can find the output of a function when I know the input.

15 mins total

5 mins individual - 3 mins group - 5 minutes class

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.3 Activity: Dimes and Quarters

I can find the output of a function when I know the input.

10 mins total

6 min group - 3 mins class share

115

100

d = -2.5q + 125

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38

q = -0.4d + 50

pg 120

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.3 Activity: Dimes and Quarters

I can find the output of a function when I know the input.

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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3.3 Activity: Dimes and Quarters

I can find the output of a function when I know the input.

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Equations for Functions

I can find the output of a function when I know the input.

We can write A = s², where s is the independent variable and A is the dependent variable.

If we knew the number of dimes and wanted to know the number of nickels, it would be useful to rewrite the equation so it looked like n = -2d + 100

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Lesson Synthesis

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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The Value of Some Quarters

I can find the output of a function when I know the input.

__

_______

__

n

v

25n

v = 25n

v = 25(10) = 250

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Cool-down

Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Unit 5 ā— Lesson 3

  • I can find the output of a function when I know the input.
  • I can name the independent and dependent variables for a given function and represent the function with an equation.

Learning

Targets

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Glossary

A function is a rule with exactly one output for each allowable input

Domain

Range

y depends on x

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Glossary

Unit 5 ā— Lesson 1-2

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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Glossary

Unit 5 ā— Lesson 3

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Slides are CC BY NC Kendall Hunt Publishing. Curriculum excerpts are CC BY Open Up Resources, with adaptations CC BY Illustrative Mathematics.

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This slide deck is copyright 2020 by Kendall Hunt Publishing, https://im.kendallhunt.com/, and is licensed under the Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0), https://creativecommons.org/licenses/by-nc/4.0/.

All curriculum excerpts are under the following licenses:

IM 6–8 Math was originally developed by Open Up Resources and authored by Illustrative Mathematics, and is copyright 2017-2019 by Open Up Resources. It is licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0). OUR's 6–8 Math Curriculum is available at https://openupresources.org/math-curriculum/.

Adaptations and updates to IM 6–8 Math are copyright 2019 by Illustrative Mathematics, and are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

Adaptations to add additional English language learner supports are copyright 2019 by Open Up Resources, and are licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

The Illustrative Mathematics name and logo are not subject to the Creative Commons license and may not be used without the prior and express written consent of Illustrative Mathematics.

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