Find the equation of the line passing through points (-1,1) and (2, -4).

19

Find the equation of the line intersecting x-axis at a distance of 3 units to the left of the origin with slope -2.

20

Find the equation of the line intersecting y-axis at a distance of 2 units above the origin and making an angle of 30° with positive direction of x-axis.

22

Find the equation of a line where perpendicular distance from the origin is 5 units and the angle made by the perpendicular with the positive x-axis is 30⁰.

23

The vertices of triangle PQR are P(2, 1), Q(-2, 3) and R(4, 5). Find equation of the median through the vertices R.