Wendys is offering the new World Cup Fries with tahini sauce as a promotional tie-in for the new season of Ted Lasso on AppleTV, and wonders how much they should charge. It test-markets five different prices in the cities listed below, with the listed resultant sales (in thousands of dollars):

City	Sales($000s)	Price($)	Price2	Sales2	Price*Sales
Rochester	75	0.99	0.98	5625.00	74.3
Ottumwa	70	1.29	1.66	4900.00	90.3
Seattle	45	1.49	2.22	2025.00	67.1
Raleigh	33	1.89	3.57	1089.00	62.4
Denair	42	2.19	4.80	1764.00	92.0
sum	265	7.85	13.23	15403.00	386.0
mean	53	1.57	2.65	3080.60	77.2
st.dev.	18.4	0.5	1.53	2037.06	13.4

a. Compute (numerically) and interpret (in words) the correlation between sales and price. Show all work

b. Estimate the regression function between sales and price; show all work