00:01
Question 4, we're given the coordinates of the points a, b and c.
00:04
And we told that at this point are collinear.
00:07
We'll be finding the values of y and z.
00:12
Now, if these three points are collinear, that means, let's say this is a, a, b and c.
00:18
So i'm going to start with a and then b and c.
00:25
Given by the values of x, you can tell that that's the order in which they take.
00:30
Take if we find the slope of ab it will be the same as a slope of bc so we can use an idea of slope and let's start we're finding the slope of ab using x and y and then we'll do the same thing for bc using x and y so delta y over delta x equals all right let's start it's going to be negative one change the next negative 1 minus b.
01:07
That's changing y over changing x, negative 2 minus 2.
01:14
That should correspond to change y minus 4 over 10 minus 2.
01:35
Okay, so let's look at this...