I have a regression formula of y=4.955*x+(286.516). I am told to find the answer when x =15

Question

X and Y Coordinates to get  the regression formula y=4.955*x+(286.516) are (0,280), (2,300), (5,317), (6, 319), (7,324), (8,322), (9,328), (10,335).  We are asked to find y when x =15.

Answer 1

Thats formula for strate line

y=4.955x +286.516

EVALUATE at x=15...

4.955*15+286.516...4.955*15=74.325

=360.841