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11-07-2018
Mathematics

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11-07-2018

Answer

y = 2x

Explanation
The first thing is to find the gradient of the line.

Gradient = Δy/Δx
= (4--2)/(2--1)
= 6/3
= 2

Now a general point (x, y) and one of thegiven points.

(y - 4)/(x - 2) = 2
y - 4 = 2(x - 2)
y = 2x - 4 + 4
y = 2x + 0

y = 2x

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