Basics of Exponential Functions

Which function will show exponential behavior?
f(x) = (4.3)^x
g(x) = 4.3x + 9

• f(x)

• g(x)

• both

• neither

What is the equation for this graph?

• y=2(.5)^x

• y=2(4)^x

• y=3(.2)^x

• y=2(3)^x

Which of the following is an exponential function?

In an exponential function, what does the 'a' represent?
f(x) = a ⋅ b^x

• Slope

• y -intercept

• x-intercept

• Common Ratio

Which equation matches the graph?

• y = 2^x+3

• y = 2^x + 3

• y = 2^x

• y = 2^-x

Which of the following is an exponential decay model?

• y = 3 * (1/2)^x

• y = 1/2 * (3)^x

• y = -2 * (2)^x

• y = -3 * (3/2)^x

In an exponential function, what does the 'b' represent?
f(x) = a ⋅ b^x

• Slope

• y -intercept

• x-intercept

• Common Ratio

In an exponential function, what is an interpretation of the y-intercept?

• 
  initial amount

• 
  ending amount

• 
  growth factor

• 
  decay factor

What is a, the starting term, for the function: f(x) = 300(1.16)^x?

• 300

• 1.16

• .16

• x

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

• (.27)^x

• .27

• 13

• 3.51