RETAKE Unit 4A Test Exponential Functions

Evaluate the function for the given value:

f (x) = 5^x for f(4)

• 20

• 625

• 125

• 25

Evaluate the function for the given value:

h(t) = 3 • 4^t for h(-3)

• $\frac{3}{64}$

• 192

• -36

• $-\frac{3}{64}$

What is the y-intercept of the function?

• 2
• 3
• 1
• -2

What is the equation that represents the exponential function in the image below?

• y=3(½)^x
• y=3(2)^x
• y=(2)^x
• y=2(3)^x

Which equation best describes the graph? 

• y = 2^x + 4
• y = 2^x - 3
• y = 2^x - 4
• y = 2^x + 3 

What is the asymptote value in the function?

• 3
• 2
• 7
• 0

Is the pictured graph growth, decay, or linear or none?  

• Exponential Growth
• Exponential Decay
• Linear
• None

Is the pictured graph growth, decay, or linear or none?  

• Growth
• Decay
• Linear
• None

Write an equation that models the following situation:
Samantha's hair was known to grow very rapidly. It began at a length of 6 in and grew at a rate of 14% a week.

• y=6(0.14)^x
• y=6(1+14)^x
• y=6(1.14)^x
• y=6(0.86)^x

What type of function is y = 7(5/4)^x?

• Exponential Growth
• Exponential Decay
• Linear
• None of the above