If (x1,y1) and (x2,y2) are two points, the slope (m) is (y2-y1)/(x2-x1).
Here (x1,y1) is (-5,-7) and (x2,y2) is (-3,3). Compute the slope (m) plugging these values into the above formula.
Point slope equation is (y-y1) = m(x-x1).
plug m, x1 and y1 into the above equation.