Unit 2 Lesson 9

 $Given:\ f\left(x\right)=8\left(2\right)^x\ find\ f\left(-1\right)$  

• 8

• 2

• 4

• -4

Tags

CCSS.HSF-IF.C.8B

 $Given:\ f\left(x\right)=4^x\ find\ f\left(-1\right)$  

• 4

• 2

• 1

•  $\frac{1}{4}$  

Tags

CCSS.HSF-IF.C.8B

 $f\left(9\right)\approx6$  What is this statement saying about this situation? (CHECK ALL THAT APPLY)

• In year 9 the price is about 6 dollars per watt 

• In 1986 the price is about 6 dollars per watt

• In year 6 the price is about 9 dollars per watt 

• In 1983 the price is about 9 dollars per watt

Tags

CCSS.HSF.IF.B.4

What is  $f\left(4\right)?$  

• 1977

• 4

• 25

• 30

Tags

CCSS.HSF.LE.B.5

What is  $f\left(3.5\right)?$  

• 31

• 34

• 25

• 29

What does  $f\left(3.5\right)$  represent in the context of this problem?

Tags

CCSS.HSF.LE.B.5

When $f\left(t\right)=45$  what is t? 

• 1

• 2

• 3

• 4

By what factor did the cost of solar cells change each year?

• 80

•  $\frac{4}{3}$  
  

•  $\frac{6}{9}$  
  

•  $\frac{3}{4}$  
  

Tags

CCSS.7.RP.A.2C

 $D=80\left(\frac{3}{4}\right)^y$  

This graph is represented by the equation above. Use the equation to find the dollars per watt from the year 1976. 

• $106.67

• $80

• -1

• 0.75

Tags

CCSS.HSF.LE.B.5

 $Given:\ f\left(x\right)=2\left(\frac{5}{2}\right)^x\$  how is this function changing?

• Increasing linear

• Decreasing linear

• Exponential Growth

• Exponential Decay

Tags

CCSS.HSF-IF.C.8B