Question

regression equation :8x-10y+66and 40x-18y=214​

Answer 1

Explanation:

8x-10y=-66---------1

40x-18y=214--------2

multiplying EQ 1 by 5,we get

40x-50y=-330----------3

subtract EQ 2 from EQ 3,we get

40x-50y=-330

-40x -18y =214

- + -

_____________

-32y =-544

y= -544/-32

y=17

put y=17 in EQ 1, we get

8x-10(17)=-66

8x-170=-66

8x=-66+170

8x=104

x=104/8

x=13

(x,y)= (13,17) is the solution.