00:01
We're asked to determine whether the line that goes through these two points right here, we'll call it line one, is parallel to the line that goes through these two points right here.
00:15
We'll call it line two.
00:17
Now, one thing that you could do is graph this line, line one, and then you could graph line two, and you could see if they look like they're parallel or not, but that's not a very precise way to do it.
00:31
The best most accurate way to do it is to use the formula, m, which is slope, is equal to the change in y divided by the change in x, and see if the two lines have the exact same slope.
00:49
Now you would need to assign this the value of x1 and this the value of y1, this the value of x2, and this the value of y2.
00:59
This would also have the value of x1, y1, and this would be x2, y2.
01:08
You're going to work the formula out two completely separate times.
01:12
We're going to see if they have the same slope or not.
01:15
If they have the same slope, then they're going to be parallel to one another.
01:19
If they don't have the same slope, they're not going to be parallel to one another.
01:24
The first time we work it out, we'll be doing it for line one.
01:28
We'll work it out in green to keep it separate.
01:30
Y2 is 4 minus y1 is 6...