00:01
Here, we're given two points, 7 .1 and 9 .8.
00:05
And we want to find, essentially, all the equations of this line in different forms.
00:11
So for part a, we really are just saying what is the slope of the line that passes through that? so this is just going to say change in y over change in x.
00:19
So change in y is 8 minus 1.
00:22
That's this one minus that one.
00:24
And then x will be 9 minus 7.
00:27
So change in y is 7, change in x is 2.
00:29
So the slope is going to be 3 .5.
00:33
Now for part b, we want to find the point slope form.
00:37
So we're going to say y equals y not plus m times x minus x not.
00:43
Well, y not is the y value at this point.
00:47
Well, it doesn't matter which point we want to choose...