00:01
In this problem, we have two points, and we want to use those points to come up with the equation of the line.
00:06
At first glance, it may not look like you have two points because they're given in function notation.
00:10
But here we have an input of negative 5 and an output of negative 7.
00:14
So that's the point negative 5, negative 7.
00:16
Here we have an input of negative 9 and an output of negative 4.
00:20
So that's the point negative 9, negative 4.
00:22
Now to write the equation of the line, the first thing we need is the slope.
00:27
So to find the slope, we say m equals y2 minus y, 1 over x2 minus x1.
00:33
So we're going to say this is x1 y1, x2, y2.
00:37
So my slope is going to be negative 4 minus negative 7 over negative 9 minus negative 5, which is going to be negative 4 plus 7, which is 3 over negative 9 plus 5, which is negative 4.
00:54
So my slope is negative 3 4...