Exponential Functions (Math 1 M3)

Which graph below represents exponential decay?

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Evaluate f(-3) for f(x) = 2^x

• 1/8

• 8

• -6

A radio-active atom has a half-life of a day. This means that it decays by 1/2 each day. Write an equation for this exponential function if you start with 64 grams.

• Not enough information

Which equation below is exponential?

Write the NOW-NEXT form of the following geometric sequence:

1,  3,  9,  27,  ...

• NEXT  =  NOW x 3

• NEXT  =  NOW x 5

• NEXT  =  NOW x 10

Which equation below represents exponential decay?

In tables of exponential functions, you __________ by the same amount each time to get to the next number.

Assuming the pattern in the table continues, what is the function value when x=6?

• 486

• 1,458

• 1,166

Which function is growing the fastest?

• Function #1

• Function #2

• Not enough information