Write the equation of a line in slope-intercept form that has a slope of -2 and passes through the point (-1,8)

Guest Mar 19, 2020

#2**+1 **

First, let's define slope-intercept form: it's the form that's usually taught first in math with coordinates(at least in my experience):

y = mx + b, where m is the **slope**, and b is the **y-intercept**.

The problem already gives us a slope of -2, so we can already write part of our desired equation:

y = -2x + b

Next, the problem gives us a point of (-1, 8). Here, we can plug the point into the equation, with the respective x and y values, giving us:

8 = -2 * (-1) + b

This simplifies to

8 = 2 + b, or

b = 6

Finally, we have our desired equation, which is **y = -2x + 6!(not factorial)**

jfan17 Mar 20, 2020