Question

How do you write an equation in standard form when given slope and point on line (6, -8), m = -2?

Answer 1

Substitute the variables in the slope-intercept equation for our numbers.

Explanation:

This is the slope-intercept equation:

`y=mx+b`

The letter `m` is the slope (-2) and the letters `y` and `x` are our x- and y-variables (6 and -8, respectively).

Our equation is this:

`-8=-2(6)+b`

From here, we solve for `b`:

`-2⋅6=-12`

`-8=-12+b`

`4=b`

We now know that `b=4`, so we can plug it back into our equation to get our answer. Since this is an equation with an infinite number of coordinates on it, the only numbers we're going to put in are the slope and `b`. This is what we get:

`y=-2x+4`