Precalculus Exponential Functions with Graph

Change to exponential form.

log_a2 = 5

• a² = 5

• 5² = a

• a⁵ = 2

• 2⁵ = a

What is the y-intercept of the function?

• 2

• 3

• 1

• -2

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

• Growth

• Decay

• Linear

• None

Is this exponential growth or decay?

• Growth

• Decay

Pick the equation that is exponential growth

• y=2(0.5)^x

• y = 0.5(2)^x

Is the following function an example of decay or growth?

f(x) = 2(1.25)^x

• Exponential Growth

• Exponential Decay

Identify the y-intercept (initial value) in the function f(x)=13(.27)^x

• (.27)^x
• .27
• 13
• 3.51

Identify the y-intercept (initial value) of the function f(x)=2(4)^x.

• 2

• 4

• (2)^x

• 8

Which of the following is an increasing exponential function whose y-intercept is 50?

• y = 50(.05)^x

• y = 50x - 4

• y = (2)^x + 50

• y = 50(1.4)^x

In an exponential function, what does the 'a' represent? 

• SLOPE

• RATE OF CHANGE

• Y-INTERCEPT

• COMMON RATIO