Find the equation of the straight line which divides the join of the points (2, 3) and ( – 5, 8) in the ratio 3 : 4 and is also perpendicular to it.
Given, A line which divides the join of the points (2,3) and ( – 5,8) in the ratio 3:4
To Find : The equation of the line.
Explanation: The coordinates of the point which divides the join of the points (2,3) and ( – 5,8) in the ratio 3:4 is given by (x,y).
Coordinate of x when line divides in ratio m:n
x =
x =
Coordinate of y when line divides in ratio m:n =
y =
y =
The slope of the line with two points is, m =
Now, The slope of joining the points (2,3) and ( – 5,8) =
m =
The equation of the line is
y
y
35y – 180 = 49x + 63
49x – 35y + 229 = 0
Hence, The equation of line is 49x – 35y + 229 = 0