How do you write an equation in standard form given (-2, 7) m=-4?

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Answer 1 · 2016-07-16T09:48:05

$y = - 4 x - 1$ $y=-4x-1$

The Standard form of the equation is

$y = m x + c$ $y=mx+c$
In the problem $x = - 2; y = 7 and m = - 4$ $x=-2; y=7 and m = -4$

We shall find $c$ $c$

$m x + c = y$ $mx+c=y$
$- 4 (- 2) + c = 7$ $-4(-2)+c=7$
$8 + c = 7$ $8+c=7$
$c = 7 - 8 = - 1$ $c=7-8=-1$

The equation is -
[Substitute $m = - 4 and c = - 1$ $m=-4 and c=-1$ in $y = m x + c$ $y=mx+c$ ]

$y = - 4 x - 1$ $y=-4x-1$