To create an equation, you have to find the slope of the line
m =

Where m is your slope and:
(4,5) =>

(-3,-1) =>

So, plug the numbers into the equation

The slope of this equation is 6/7
Point slope form of a line is:

(-3,-1) =>

and m = 6/7
y + 1 = 6/7 (x + 3)