pinkster104 pinkster104

24-10-2015
Mathematics

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The equation y+2=2(x-d) is the line that passes through the points (-1,-2) and (2,4). What is the value of d?

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ninam2454 ninam2454

25-10-2015

-2+2=2(-1-d)
0=2(-1-d)
0=-2-2d
2=-2d
-1=d

4+2=2(2-d)
6=2(2-d)
6=4-2d
2=-2d
-1=d

so the answer for d would be -1, I substituted the coordinates of x and y with the points to get the answer

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