COORDINATE GEOMETRY C5

Find the slope of a line which passes through (3, -2) and (6,-9).

Solution

x₁ = 3,  y₁ =-2,  x₂ = 6,  y₂ = -9

m = y2 –y1

     x2 – x1

m =   -9 –(-2)

          6 –3

m =   -9 + 2

           3

m =    - 7

           3

Hence the slope is -7/3

TRY THIS...............

Find the slope of a line which passes through (3, -8) and (4,-2).