The table gives the number of songs downloaded from MyTunes at different prices per song.
a. Find the equation of the linear regression line. Round the slope and y-intercept to the nearest hundredth.
b. What is the slope of the linear regression line?
c. What are the units of the slope when it is expressed as a rate?
d. Based on the linear regression line, how many thousands of downloads would MyTunes expect if the price was changed to \$0.45? Round to the nearest integer.
e. Is your answer to part d an example of interpolation or extrapolation?
f. Find the correlation coefficient to the nearest hundredth.
g. Describe the correlation.
(in thousands)
\$0.89 ...................................................... 1,212
\$0.79 ...................................................... 1,704
\$0.69 ...................................................... 1,760
\$0.59 ...................................................... 1,877
\$0.49 ...................................................... 1,944
\$0.39 ...................................................... 2,011

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