For:Point A: (x1, y1), Point B: (x2, y2)
Slope m = (y1-y2)/(x1-x2)
X Intercept a = x1 - y1 * (x1 - x2) / (y1 - y2)
Y Intercept b = y1 - mx1
Line Equation: Y = mX + b
For instacne, Point A: (3, 2), Point B: (7, -4), Slope m = -6/4 = -1.5.
Y Intercept b = 6.5, X Intercept a = 4.333333, Line Equation: Y = -1.5X +6.5