A maker of baby foods has found a high correlation between the aggregate company sales(in $100.000) and the number of births nationally the preceding year.Suppose that the sales and birth figures during the past eight years are:

Year	1	2	3	4	5	6	7	8
Sales(in $100.000)	6.1	6.4	8.3	8.8	5.1	9.2	7.3	12.5
Births(in millions)	2.9	3.4	3.5	3.1	3.8	2.8	4.2	3.7

a)Determine a regression equation for predicting sales based on births.Use years 2 through 8 as your baseline

b)What forecast for sales revenue in year 9 do you obtain

c)Suppose that births are 3.3 million in year 9 ,determine the sales revenue in year 10