Line AB is perpendicular to CD. Coordinates of B, C and D are respectively (4, 0), (0, –1) and (4, 3). Find :

(i) Slope of CD.

(ii) Equation of AB.

A and B are two points on the x-axis and y-axis respectively.

(i) Write down the coordinates of A and B.

(ii) P is a point on AB such that AP : PB = 3 : 1. Using section formula, find the coordinates of point P.

(iii) Find the equation of a line passing through P and perpendicular to AB.

The inclination of y-axis is:

1. 0°

2. 45°

3. 90°

4. 180°