Question

can you ask questions here about graphs? I don't know. Ok so if x=-3 then what does y=?

Answer 1

You need the equation in order to determine the value of y.

Once you have the equation, you just substitute x = -3 and find y. Straightforward.

Answer 2

ok but it's on a graph andi have no idea how to do it... I feel really stupid..

Answer 3

if that is all of the information then x = -3 regardless of the y value.