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

Jul 16, 2016

$y = - 4 x - 1$

Explanation:

The Standard form of the equation is

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

We shall find $c$

$m x + c = y$
$- 4 \left(- 2\right) + c = 7$
$8 + c = 7$
$c = 7 - 8 = - 1$

The equation is -
[Substitute $m = - 4 \mathmr{and} c = - 1$ in $y = m x + c$]

$y = - 4 x - 1$