00:01
All right, so once again, i have written our answer as set notation already.
00:06
They gave us the inequality negative 2 is less than or equal to y, which is less than 3.
00:14
And so for set notation, all you need to do is say we want the set of y numbers such that that's true.
00:22
Next, i'm dealing with negatives and positives, so i'll put my zero close to the middle, and i'll use a scale of 1 to get to these important boundaries.
00:33
So that's negative 2 and 3.
00:38
Next, i'm going to put a point at each of the boundary numbers.
00:45
So a point at negative 2 and a point at 3.
00:50
At negative 2, it's included in the solution set.
00:53
So that's a closed thought, just like this one was closed.
00:58
But 3 is not included.
00:59
We want numbers that are less than 3, not less than are equal to 3.
01:02
So just like up here where we had open boundary.
01:05
And over here where we had one open point, we have one boundary that's open here.
01:11
And we want the numbers that make this true...