00:02
I'm going to quickly plot these points.
00:06
So i have a at negative 3 -1, b at 0 -5, c at 4 -2, and d at 2 -9.
00:29
This is my figure.
00:34
And i want to show that the midpoint of ac, so let's find the midpoint of ac.
00:44
So we want to take the axes, add them together and divide by two.
00:53
The ys, add them together and divide by two.
00:57
So the midpoint of ac is one half, three halves.
01:04
And i want to show that that's on an equation of a line through bd.
01:11
Okay, so now i need an equation of a line through bd.
01:16
Bd.
01:17
So i'm going to first find the slope of bd, which is going to be change in y over change in x.
01:30
So negative 14 over 2, that gives me negative 7...