00:01
We are going to graph this linear equation by plotting points, and we're going to do it smartly.
00:06
We would like to plot integer points, not really fractions.
00:11
So when we choose points to plot on a graph, we can pick anything we want for x or y.
00:17
But we're going to choose wisely.
00:19
First, to get rid of this fraction, we're going to let x be zero.
00:28
Here, there we go.
00:31
That's going to get rid of the fraction.
00:33
Next, we're going to let x be 5 and 10.
00:37
Going to get rid of that denominator.
00:39
So let's show you how that's going to help us.
00:42
So first, for our first x, y ordered pair, we have two -fifths times zero minus y equals four.
00:53
So two -fifth times zero is zero minus y equals four.
00:58
So zero minus y is negative y equals four.
01:02
If we divide both sides by negative one, we get y equals negative four.
01:07
So our first point is 0 negative 4.
01:13
Next, let x be 5 because 2 5ths times 5 is going to get rid of that fraction.
01:21
So 2 5ths times 5 minus y equals 4.
01:25
2 5th times 5 is 10 5th, which is 2...