Caf$$ Michigan's manager, Gary Stark, suspects that demand for mocha latte coffees depends on the price being charged. Based on historical observations, Gary has gathered

the following data, which show the numbers of these coffees sold over six different price values:

Using simple linear regression and given that the price per cup is $$1\mathrm{.}85,$ the forecasted demand for mocha latte coffees will be

decimal place$).$

cups $($enter your response rounded to oneno

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$)$:

$Y=$

$+$