Answer the Following Questions Using the Information Below:
John's 8-Year-Old

question 113

Multiple Choice

Answer the following questions using the information below:
John's 8-year-old Chevrolet Trail Blazer requires repairs estimated at $6,000 to make it roadworthy again. His wife, Sherry, suggested that he should buy a 5-year-old used Jeep Grand Cherokee instead for $6,000 cash. Sherry estimated the following costs for the two cars:
$\begin{array}{lrr}&\text { Trail Blazer }&\text { Grand Cherokee }\\\text { Acquisition cost } & \$ 25,000 & \$ 6,000 \\\text { Repairs } & \$ 6,000 & - \\\text { Annual operating costs } & & \\\text { (Gas, maintenance, insurance) } & \$ 2,280 & \$ 2,100\end{array}$
-What should John do? What are his savings in the first year?

• A) Buy the Grand Cherokee; $8,100
• B) Fix the Trail Blazer; $3,180
• C) Buy the Grand Cherokee; $180
• D) Fix the Trail Blazer; $6,280

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Definitions:

Residual Plot

Graphical representation of the residuals that can be used to determine whether the assumptions made about the regression model appear to be valid.

Regression Model

A statistical model that estimates the relationship between a dependent variable and one or more independent variables, often used for prediction and forecasting.

Correlation Coefficient

A numerical value indicating how much two or more variables change in relation to each other.

Linear Association

A type of relationship between two variables where the graph of their relationship is a straight line, indicating a proportional increase or decrease.