COORDINATE GEOMETRY C10

Find the slope of a line which passes through (3, -2) and (6,-7).

Solution

x₁ = 3,  y₁ =-2,  x₂ = 6,  y₂ = -7.

m = y2 –y1

      x2 – x1

m =   -9 –(-7)

          6 –3

m =   -9 + 7

           3

m =    - 2

           3

Hence the slope is -2/3

TRY THIS.........

Find the slope of a line which passes through (3, -9) and (6,-12).