00:01
Okay, we need to look at the following table.
00:04
If we had a table where we have the x value and a y value, and it's 2, 5, 4 and 12, 9, and 6, negative 2, negative 4, negative 3, and 8.
00:34
And it's asking us whether or not it's a function.
00:37
And if it's a function, is it a 1 -to -1 function? well, we know it's a relationship.
00:44
Now to find out whether or not it's a function, we need to find out if we have a constant rate of change.
00:50
So we're going to take two points on here and figure out what our rate of change is.
00:54
Now remember, our rate of change is the same thing as our slope where we have y2 minus y1 over x2 minus x1.
01:03
So if i take two points and i'm going to take this one as my point two.
01:14
This one is my point one.
01:17
So i'm going to take and do 12 minus 5 over 4 minus 2.
01:26
And i'm going to get a slope that's 7 over 2...