Question

if A(6,4)&B(2,12) are two given poinys then find the slope of a line (1) parallel to AB
(2) perpendicular to AB

Answer 1

slope of line joining two point (a, b) and (c, d) is (d - b) / (c - a)
So here slope joining A and B = (12 - 4) / (2 - 6) = 8 / (-4) = -2

If slope of line L = m then, slope of line parallel to L will be (m) and slope of line perpendicular to L will be (-1 / m)

So,
Ans (1) -2
(2) 1/2