Question

I need help finding an equation of the line that has y-intercept=-2 and containing the point (5,-3)

Answer 1

Do you know the slope intercept form for a line?
y=mx +b?

Answer 2

yes

Answer 3

Good. So "b" is the y-intercept (it's a reason for the name) so you know that
y=mx+(-2)
All you need to do is find the slope m.
All you need to do is plug in the (x,y) that they give you and solve for m and you have you equation.

Answer 4

awesome. what if i was given the x-intercept instead?