Question

Find the missing values for the exponential function represented by the table below.

x y
-2 8
-1 12
0 18
1
2

a. -27 -40.5
c. 27 40.5
b. 12 8
d. -27 40.5

Answer: C

Answer 1

c. 27 40.5

Explanation:

Step 1 is "read and understand the problem." Step 2 is "read the answer choices."

To choose the correct answer here, you only need to know that exponential growth functions are non-decreasing. The next y-values cannot be smaller than the values already shown.

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If you insist on doing some calculation, ...

Comparing adjacent values, you see that the common ratio is 3/2.

• 18 × 3/2 = 27
• 27 × 3/2 = 40.5