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

question 45

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

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