00:01
What i have here is a systems of inequalities question.
00:05
If i graph these inequalities, i can determine if they have any coordinates that satisfy, if there are any coordinates that satisfy both inequalities.
00:16
So in order to figure this out, to do that, you have to graph them.
00:21
Well, you don't have to graph them.
00:23
But graphing them, i believe, is certainly the easiest way.
00:25
You could do some substitution, but that would really only get you.
00:31
Anyway, you could do substitution, but i'm going to do graphing because i like to graph.
00:36
So my first equation here i'm going to do in blue.
00:39
So this one's going to be my blue equation.
00:41
I've got a y intercept of negative three, one, two, three.
00:46
And i have a slope of two.
00:49
So this is my negative three is my y intercept.
00:52
That's my b and my y equals mx plus b.
00:55
And my slope here is two.
00:57
That's my m.
00:59
And so it's two over one.
01:01
It's positive so up to right one up to right one and this is a dotted line because it does not have the or equal to so um okay great now i'm going to do my second line in green and i'm going to do the y intercept of positive one and i have a slope of negative one four so that's my m and that means that i am moving i could either be moving down one and right four or i could be me up one and left four so let's see i'm going to go first i'll do up one and left one two three four and then i'll go down one and right four one two three four and so i have this.
02:08
Oh, and it's also going to be dotted because there's no or equal to.
02:14
That way, dotted lines are up, not quite.
02:21
Amazing.
02:24
There we go.
02:26
Boom.
02:27
And so these are my systems.
02:29
So the interesting thing here is because they are both dotted lines, their intersection point doesn't satisfy either of them.
02:37
So that's why if you do substitution, it can get a little sticky, because then the solution you find, like does it actually satisfy it? but anyway, so i'm graphing, as i've mentioned.
02:46
So now i'm going to pick the point.
02:48
I'm going to pick the point zero, zero...