A baker in Julien would like to increase profits from his apple pie business. He collected data for the last 15 weeks.

a) What would be the impact on his profitability of increasing the price of a pie by $1?

b) What would be the impact on profitability of increasing his advertising budget by $1,000?

c) What would be the impact on profitability of implementing both simultaneously?

Week	Pie Sales	Pie Price ($)	Weekly Advertising ($)
1	350	5.50	3,300
2	460	7.50	3,300
3	350	8.00	3,000
4	430	8.00	4,500
5	350	6.80	3,000
6	380	7.50	4,000
7	430	4.50	3,000
8	470	6.40	3,700
9	450	7.00	3,500
10	490	5.00	4,000
11	340	7.20	3,500
12	300	7.90	3,200
13	440	5.90	4,000
14	450	5.00	3,500
15	300	7.00	2,700

This is an example of multivariable regression analyses.