Question

A(2,5) B(3,9)

Mab = ?

Answer 1

Y-y1 / y2-y1 = x-x1 /x2-x1
y-5 / 9-5 = x-2 / 3-2
y-5 /4 = x-2 / 1 (kali silang)
1(y-5) = 4 (x-2)
y-5 = 4x -8
y    = 4x - 8 +5
y = 4x - 3

m = 4

Answer 2

M = y2 - y1
       x2 - x1
   = 9-5
      3-2
   = 4