Solve the Problem $\mathrm { r }$ Is $- 0.55$ Determine How Much of the Variation in the Number

Multiple Choice

Solve the problem. Round your answers to the nearest whole percent.
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The scatter diagram shows the data for the number of cars waiting by a school (y) and the amount of time after tl of classes (x) . The correlation coefficient $\mathrm { r }$ is $- 0.55$ . Determine how much of the variation in the number of wait cars can be accounted for by the best-fit line.

A) $30 \%$
B) $20 \%$
C) $70 \%$
D) $45 \%$ end