A part of the CPI is given below: $$\begin{array} { l | l | l | l | l | l }
\text { Year } & 1975 & 1980 & 1985 & 1990 & 1995 \
\hline \text { CPI } & 53.8 & 82.4 & 107.6 & 130.7 & 152.4
\end{array}$$ Suppose a week's groceries in 1980 cost $70. What would these groceries cost, to the nearest dollar, 10 years later?
A) $38
B) $44
C) $111
D) $129

Question

A part of the CPI is given below: $$\begin{array} { l | l | l | l | l | l } 
\text { Year } & 1975 & 1980 & 1985 & 1990 & 1995 \
\hline \text { CPI } & 53.8 & 82.4 & 107.6 & 130.7 & 152.4
\end{array}$$ Suppose a week's groceries in 1980 cost $70. What would these groceries cost, to the nearest dollar, 10 years later?
A) $38
B) $44
C) $111
D) $129

Quizplus · Accepted Answer

To find the cost in 1990, use the ratio of the CPIs: (130.7 / 82.4) * $70 = $111.

A Part of the CPI Is Given Below Suppose a Week's Groceries in 1980 Cost $70