For g = {(-5,2), (-4,-1), (3,-8), (-2,0), (4,-9)} find the indicated value

g(-4)

g(-4) means the value of the function (what you usually call y, e.g. y = 3x + 1, y is the function) when x = -4.

You have a set of coordinates from which you can find the answer. Simply find -4, and find the y-coordinate that is together with it.

What do you get?