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3 years ago

Write the standard form of the equation of line through (3, -1) with a slope of -1.

Mathematics

1 answer:

kirill115 [55]3 years ago

5 0

The standard form of a line: $Ax+By=C$ .

The point-slope form: $y-y_1=m(x-x_1)$

We have the point (3, -1) and the slope m = -1. Substitute:

$y-(-1)=-1(x-3)$

$y+1=-x+3$ add x to both sides

$x+y+1=3$ subtract 1 from both sides

$\boxed{x+y=2}$

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2 years ago

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2 years ago

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3 years ago

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