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Walt:

('»r°.Chi 0>t

/* UI 0

How do you use function notation to describe

simple functions?

WILF:

  • Able to understand and apply how to use function notation to describe simple functions.(C/B)
  • Able to analyze how to use function notation to describe simple functions. (A)
  • Able to evaluate and justify how to use function notation to describe simple functions. (A*)

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Starter: (2 minutes)

What you know about functions?

Function notation is a simpler method of describing a function

without a lengthy written explanation. The most frequently used

function notation is f(x) which is read as “f” of “x”.

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Key vocabulary:

  • A function is a rule or set of instructions for changing one number (the input) into another (the output).
  • A function notation is a mathematical way of writing equations (functions).

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Skill Drill

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Skill Drill

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Find the value of x if f(x) = 4.

f(x) = 2x +2

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Directions: Given the three 1'unct itins hcltiw. f(x), g(x), and h{x), li nd the value ytiu iii'c ‹iskcd ltd li iitl.

l

— 2

Nntc that answci x herc can he ncgativc. whicI is nt›t the case with the text'x ñtuclent Produced kexpnnsc (“¿i icl-in") questi‹›ns.

1.

/(I)

2.

y(())

3.

h(4)

4.

/(—2)

5.

¿(4)

f\.

it(5)

7.

/(I())

8.

¿(—2)

5.

h(2)

f0.

f())

II.

y(—1)

12.

h(IN)

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Find the input value of x that will result in the given output value of the function.

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f: x r—› 2x — 1

​

g : x »-+ —, x x 0

x

Find the value of

(i) f(ż),

​

(îî) g(ô)

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Calculate:

(ï) f(2) (ii) f(-2) (iïï) f(0.5) (iv)

f(0) ïn:

f(ž¢) = 3ł¢ + 2

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f(x) 4x -1, find:

(a)

(c) 1.5

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If f(x) = 3x -1 and f(x) = 3, find x.

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rȘ)= a+2 , x #-2

(øJ WOfk Ottt g 4 .

h(x) = x2 + 6

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Plenary: (5 minutes)