This Rating Chart of Low-Priced CD Players Is Adapted from a Consumer

Essay

This rating chart of low-priced CD players is adapted from a Consumer Reports Buying Guide.
$$\begin{array} { l l l } \underline{ \text {Brand and model }}& \underline{\text {Price} }& \underline{\text {Overall score }}\\\text { Onkyo DX-702 } & \$ 185 & 88 \\\text { Kenwood Dp-2030 } & \$ 155 & 86 \\\text { Philips CD40 } & \$ 150 & 85 \\\text { Pioneer PD-5700 } & \$ 150 & 85 \\\text { Sony CDP-491 } & \$ 145 & 83 \\\text { Technics SL-PG300 } & \$ 170 & 83 \\\text { JC XL-V241TN } & \$ 135 & 79 \\\text { Sears LXI } & \$ 120 & 75 \\\text { Optimus CD-1760 } & \$ 120 & 74 \\\text { Sharp DX R250 } & \$ 130 & 74\end{array}$$
A) Make a scatter plot of these data. Choose your scales carefully.
$$\begin{array}{l}\begin{array} {| l | l |l |l |l |l |l |l | } \hline \text { }&&&&&&&\\\hline \text { }&&&&&&&\\\hline \text { }&&&&&&&\\\hline \text { }&&&&&&&\\\hline \text { }&&&&&&&\\\hline \text { }&&&&&&&\\\hline \text { }&&&&&&&\\\hline \text { }&&&&&&&\\\hline \end{array}\end{array}$$
B) Are the two variables positively correlated? Explain how you know.
C) An equation for the line of best fit is y = 0.22x + 49. Use the equation to estimate the cost of a CD with a rating of 100.