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Q1 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.

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Answer:

Slope: -1/6

Midpoint of AB: (1, 8.5)

Distance of AB: √37

Explanation:

Slope formula:
m = (y2-y1)/(x2-x1)

Midpoint formula:
((x1+x2)/(2) ,(y1+y2)/(2) )

Distance formula:
d = \sqrt{(x2-x1)^(2)+(y2-y1)^(2)}

User Mark Gemmill
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