The slope of a line is 5, the slope of its perpendicular is :

1. 5

2. -5

3. $\dfrac{1}{5}$

4. $-\dfrac{1}{5}$

The slope of the line passing through the origin and the point (-3, 4) is :

1. $\dfrac{4}{3}$

2. $-\dfrac{4}{3}$

3. $\dfrac{3}{4}$

4. $-\dfrac{3}{4}$

The slope of the line which is perpendicular to the line segment joining the points (8, -5) and (-4, 7) is :

1. -1

2. 1

3. 45°

4. -45°

Find the slope and the inclination of the line AB if :

(i) A = (-3, -2) and B = (1, 2)

(ii) A = (0, -$\sqrt{3}$) and B = (3, 0)

(iii) A = (-1, $2\sqrt{3}$) and B = (-2, $\sqrt{3}$)