Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of - 2.

Question

Mathematics

Ruben Fry

1 March, 10:49

Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of - 2.

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Answers (2)

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Zayne Moreno · Answer 1

Ok, so here, we need to use the slope formula which is:

(y2 - y1) / (x2-x1)

y2 = 9

y1 = 5

x2 = x

x1 = 10

So:

(9-5) / (x-10) = - 2

Now, we just solve for x,

9-5 = - 2 (x-10)

4 = - 2x+20

2x = 16

x = 8