申論題

8. Tommy wants to know the relationship between the amount of the electricity fee (NT$ per month) and the monthly income of a household around his community. He made a observation of six families, and got a data set as following:

(2). Calculate b₀ and b₁. Obtain the (least squares) estimated regression function and plot it on the graph in part (1). If the monthly income of Tony's is NT$ 60,000, then how much electricity fee might he pay last month? (10%)