.. 4.45 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: PRICE $2.70 NUMBER SOLD 760 510 $3.50 $2.00 980 $4.20 250 $3.10 320 $4.05 480 Using these data, how many mocha latte coffees would be fore- cast to be sold according to simple linear regression if the price per cup were $2.802 PX 4.46 The following data relate the sales figures of the bar in Mark Kaltenbach's small bed-and-breakfast inn in Portand, to the number of guests registered that week: WEEK GUESTS BAR SALES $330 1 16 2. 12 270 3 18 380 4 14 300 a) Perform a linear regression that relates bar sales to guests (not to time). b) If the forecast is for 20 guests next week, what are the sales expected to be? PX