Unit 4 Review for Test

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

• Input

• Rate of change

• Y-intercept/Initial value

• Output

Which table represents the following equation? Plug into your calculator to see table.

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Suppose the population of a species of insects doubles every year. There are 1600 insects initially. The function for the scenario would be?

• 1600

• 2

• There is not enough information to tell.

• 9600

• 12,800

• 200

• 8000

• $ 819.20

• $ 1.4

• $ 140

Is the pictured graph increasing, decreasing, or neither?

• Increasing

• Decreasing

• Neither

What is the y-intercept of the function?

• (0, 2)

• (0, 3)

• (0, 1)

• (0, -2)

Is this exponential growth or decay?

• Growth
• Decay