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From 1980 to 1990, the consumer price index (CPI) increased from 82.4 to 130.7. If a gallon of apple juice cost $0.95 in 1980 and the price of apple juice increased at the same rate as the CPI from 1980 to 1990, approximately how much did a gallon of apple juice cost in 1990?

A. $0.56

B. $0.82

C. $1.51

D. $1.31

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  1. Today, 04:02
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    Answer: C $1.51

    To solve this, start with a proportion. Put the CPI numbers on the left and the apple juice prices on the right.

    You will have:

    82.4/130.7 = 0.95/x

    Cross multiply to solve and you will get the price of the juice is $1.51.
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