Math
posted by Maiko .
An insurance company wishes to examine the relationship between income (in $,000) and the amount of life insurance (in $,000) held by families. The company drew a simple random sample of families and obtained the following results:
Family  Income  Amount of Life Insurance
A  40  110
B  80  200
C  110  220
D  80  150
E  80  170
F  120  270
G  60  140
H  100  240
I  60  150
J  90  200
Question 1
What is the least squares estimate of the slope?
Question 2
What is the least squares estimate of the Y intercept?
Question 3
What is the prediction for the amount of life insurance for a family whose income is $85,000?
Question 4
What would be the residual (error) term for a family income of $90,000?
All answers should be to four decimal places.

1.9216
27.4254
163.3634
0.3731