Solve the problem.
-The Consumer Price Index provides a means of determining the purchasing power of the U.S. dollar from one year to the next. To use the Consumer Price Index to predict a price in a particular Year, we can set up a proportion and compare it with a known price in another year as follows: $$\frac { \text { price in year } \mathrm { A } } { \text { index in year } \mathrm { A } } = \frac { \text { price in year } \mathrm { B } } { \text { index in year } \mathrm { B } } \text {. }$$ In 1994 the Consumer Price Index was 148.2 and in 2000 it was 172.2. Find the amount that would Be charged in 2000 for the use of the same amount of electricity that cost $180 in 1994. Give your Answer to the nearest dollar.
A)$200
B)$204
C)$155
D)$209

Question

Quizplus · Accepted Answer

Using the given formula, we substitute the values: $\frac{180}{148.2} = \frac{x}{172.2}$. Solving for $x$ gives $x = \frac{180 \times 172.2}{148.2} \approx 209$.

Solve the Problem In 1994 the Consumer Price Index Was 148