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:

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$)$:

$Y=,+,x$