Key Features Exponential Functions

The value of some cell phones changes exponentially after initial release. Here are graphs showing the depreciation of two phones 1, 2, and 3 years after they were released.

What is an appropriate domain for both functions?

The value of some cell phones changes exponentially after initial release. Here are graphs showing the depreciation of two phones 1, 2, and 3 years after they were released.

Complete the phrase:  Each year, as x, increases, the value of f(x) ______________. 

• Stays the same

• Decreases

• Increases

• None of these

What is the transformation?

• Vertical Translation up 2 and Horizontal translation right 1

• Vertical Translation down 2 and Horizontal Translation left 1

• Horizontal Translation left 2 and Vertical Translation up 1

• Horizontal Translation right 2 and Vertical Translation down 1

Label the key features of the exponential function.

a

c

horizontal asymptote

x-intercept

axis of symmetry

y-intercept

An exponential function is graphed. Click on the y-intercept.

• 8

• y=0

• (0,8)

• 0.25

• (8,0)

• x=0

This graph models ​ (a)   . For this function, b is ​ (b)  

• exponential growth

• exponential decay

• a rational function

• greater than 1

• less than 1

• equal to 1

Which equation matches the graph?

• y = 2^x+3

• y = 2^x + 3

• y = 2^x

• y = 2^-x

This graph models ​ (a)   . For this function, b is ​ (b)  

• exponential growth

• exponential decay

• a rational function

• greater than 1

• less than 1

• equal to 1