00:01
Okay, so the first thing you need to do is you need to get these equal to y.
00:04
So i'm going to do the first one, x minus 3y greater than or equal to 9.
00:11
So i'm going to subtract x from both sides.
00:15
So negative 3y is greater than or equal to negative x plus 9.
00:21
Then i'm going to divide by negative 3 to everything.
00:24
When i divide by that negative 3, that makes it less than or equal to.
00:29
So why is less than or equal to one third x plus, oops, that's a negative, so negative three.
00:38
So to graph it, i'm going to start at negative three and then go up one over three.
00:46
There's a point up one over three.
00:49
There's point up one over three.
00:53
There's a point.
00:53
And then we can go the opposite direction, down one over three, down one over three.
01:00
And it is a solid line and we're shading less than so it's going to be all this is shaded okay now the second equation 3x plus y less than or equal to 9 so i'm going to subtract 3x from both sides so y is less than or equal to negative 3x plus 9 so i'm going to start at 9 let me scroll down just a little bit.
01:32
I'm going to start at nine.
01:34
And then down three...