Question

I dont know how to do it like how to graph the -x or the y

Answer 1

see explanation and attachment

Explanation:

(1) y = -x + 2

so slope is -1 and y-intercept is (0,2)

(2) 2x - y = 7

y = 2x - 7

so slope is 2 and y-intercept is (0,-7)