Question

How do you find the slope-intercept form for the equation of the line which passes through the point (–1, 3) and has a slope of –2?

Answer 1

Use the slope-intercept form equation, `y=mx+b`.

Explanation:

All you have to do is substitute some values. `M` is the slope (`-2`) and `x` and `y` can be substituted for `-1` and `3`. Our equation now looks like this:

`3=-2(-1)+b`

Now, all we have to do is solve for b:

`3=2+b`

`1=b`

We now have our equation, `y=-2x+1`.