Two points A (-2, 9) and B (4, 8) lie on a line l. (i) Find the slope of the line l. (ii) Find the coordinates of the midpoint of the points A and B (iii) Find the distance between points A and B.

Step-by-step explanation:

(i) For two different points on a line, the slope m is defined as the difference on the y-axis divided by the difference on the x-axis:

Where:

So:

(ii)

To find the coordinates of the midpoint, you can use the following formula:

Therefore:

(iii) The distance between two points is given by the following formula:

Hence:

e) none of the above because the measure of angle cba is 101°