Write an equation of the line that contains the given points.
(-1,9), (0, -8)

Step-by-step explanation:

First, let's find what m is, the slope of the line...

The slope of a line is a measure of how fast the line "goes up" or "goes down". A large slope means the line goes up or down really fast (a very steep line). Small slopes means the line isn't very steep. A slope of zero means the line has no steepness at all; it is perfectly horizontal.

For lines like these, the slope is always defined as "the change in y over the change in x" or, in equation form:

So what we need now are the two points you gave that the line passes through. Let's call the first point you gave, (-1,9), point #1, so the x and y numbers given will be called x1 and y1. Or, x1=-1 and y1=9.

Also, let's call the second point you gave, (0,-8), point #2, so the x and y numbers here will be called x2 and y2. Or, x2=0 and y2=-8.