This is a LINEAR function.��All lines go on forever in either �direction. Therefore, eventually,�the line will cover ALL x-values�and ALL y-values.�So, domain: x is all Real numbers� range: y is all Real numbers�The symbol for �all Real numbers is:

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a) A = 1.73U� A = 1.73(70) = 121.1

b) A = 1.73U�

c) A = 1.73U� a(p) = 1.73p�

d) a(100) = 1.73(100)�� a(100) = 173�

5. a(p) = 1.73p�

a(50)

a(50) means�if the input is 50, �then what is the�output�

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ie:

a(50) = 1.73(50)

a(p) = 1.73p�

a^-1(50)

a^-1(50) means�if the output is 50, �then what is the�input�

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ie:

50 = 1.73p

p = 50/1.73

a) By “technology” it means that you can use the STAT feature on the calculator to find the line of best fit for this data (linear regression). We did not do this together in class so don’t worry about it for now. We will learn and practice that skill in the next unit. ��For now, we can use what we know about lines… slope = �

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b) We have confirmed that the slope is CONSTANT.

Therefore, a linear model can be used.