you need to plug the numbers into point slope form *y-y1=m(x-x1) y and x standing for the coordinates (-3,0) so the equation would be if you plug the numbers in y-0=3/2(x+3) *if its a negative make it positive if its a positive make it negative cause if you have lets say +-3 then it would just be -3 then from there just solve for y btw the answer you have is wrong