The table below shows the prices of nine Verizon smart-phones along with their overall score (on a scale of 0-100) in a consumer rating survey presented by Consumer Reports.

a. Plot the nine data points using a scatterplot.
Describe the form, direction, and strength of the relationship between price and overall score.
b. Calculate r, the correlation coefficient between price and overall score.
c. Find the regression line for predicting the overall score of a smart-phone based on its price.

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Brand and Model Price(S Overall Score Motorola Droid X Motorola Droid HTC Droid LG Ally Samsung Omnia II HTC Imagio Motorola Devour Blackberry Stm2 9550 150 Palm Pre Plus 150 100