Question

I don't know how to do this

Answer 1

All you do is plug the x coordinate of a pair (the one on the left) in for x in the equation, and plug the y coordinate of the pair (the one on the right) for y and solve! If the answer is the same on both sides, it works for the equation. Hope that helps! Just comment if you don't get it.

Answer 2

Just replace the values of x : 9, -2, -8, 2 in the given equation y = 5x - 3 to obtain the corresponding values of y.
x = 9, y = 5(9) -3 = 42 -> Yes
x = -2, y = 5(-2) - 3 = -13 -> Yes
x = -8, y = 5(-8) - 3 = -43 -> No
x = 2, y = 5(2) - 3 = 7 -> No Hope it helped!