Exponential Functions Key Features

Which of the following is an example of exponential decay?

• y = 3(5)^x

• y = .5(5)^x

• y = 2(.5)^x

• y = 8(1)^x

Which graph represents exponential growth?

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What is the end behavior?

• As x approaches infinity, f(x) approaches infinity.

  As x approaches negative infinity, f(x) approaches infinity

• As x approaches infinity, f(x) approaches 0.

  As x approaches negative infinity, f(x) approaches infinity

• As x approaches infinity, f(x) approaches negative infinity.

  As x approaches negative infinity, f(x) approaches infinity

• As x approaches 0, f(x) approaches infinity.

  As x approaches negative infinity, f(x) approaches infinity

An exponential decay function increases, decreases, neither, or both?

• increases

• decreases

• neither

• both

Which equation is represented by the table?

• y = 40(2)^x

• y = 40(1/2)^x

• y = 40 - 2x

• y = 40 - 1/2x

What type of pattern do exponential functions have?

• Adds or subtracts by the same number every time

• Multiplies or divides by the same number every time

• Square roots all the inputs

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

• Input

• Rate of change

• Y-intercept

• Output

Write the function for the following table:

• f(x) = 5x + .08

• f(x)= 5x + 2

• f(x) = .08(5)^x

• f(x)= 2(5)^x

Write the function for the following table:

• f(x)= 1(2)^x

• f(x)= 2(1)^x

• f(x) = 2x+1

• f(x)= x+2

Which table represents the following equation?

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