This exercise contains only parts $b,c,$ and $d.$

b$)$ Using the least$-$squares regression method, the equation for forecasting is $($round your responses to four decimal places$)$:

$Y=,+,x$

c$)$ The estimate for guitar sales if Maroon $5$ performed on TV $10$ times $=,$ sales $($round your response to two decimal places$).$

d$)$ The correlation coefficient $(r)$ for this model $=,($round your response to four decimal places$).$

The coefficient of determination $(r^2)$ for this model $=,($round your response to four decimal places$).$

The percentage of variation in sales that can be explained by TV appearances $=76\mathrm{.}86\%($round your response to two decimal places$).$Mark Gershon, owner of a musical instrument distributorship, thinks that demand for guitars may be related to the number of television appearances by the popular group Maroon $5$ during the previous month. Gershon has collected the data shown in the following table:

$\backslash$table$[[$Maroon $5$ TV Appearances,$3,3,7,7,8,7],[$Demand for Guitars,$3,6,6,4,10,7]]$