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
|
Guest
|
Bar Sales
|
|
1
|
16
|
$330
|
|
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?