First of all you have to find the slope, m.
m = (y2 - y1)/(x2-x1) = (-4 - 5)/(-3 - 7) = (-9)/(-10)
m = 9/10.
Now, the equation for the line passing through two points is => (y - y1) = m (x - x1)
Putting the values: (y - 5) = 9/10 (x - 7)
10(y-5) = 9(x - 7)
10y - 50 = 9x - 63
10y - 9x + 13 = 0 is the equation of the line passing through given points.