0:00:00.820,0:00:04.170
Plot 4 comma negative[br]1, and select

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the quadrant in[br]which the point lies.

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So 4, the first[br]number in our ordered

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pair, that's our x-coordinate.

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That says how far to move in the[br]horizontal or the x-direction.

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It's a positive 4.

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So I'm going to[br]go 4 to the right.

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And then the second[br]coordinate says,

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what do we do in the[br]vertical direction

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or in the y-direction?

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It's a negative 1.

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Since it's negative,[br]we're going to go down.

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And it's a negative 1, so[br]we're going to go down 1.

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So that right over there is[br]the point 4 comma negative 1.

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So I've plotted[br]it, but now I have

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to select which quadrant[br]the point lies in.

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And this is just a[br]naming convention.

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This is the first quadrant.

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This is the second quadrant.

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This is the third quadrant.

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And this is the fourth quadrant.

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So the point lies in the[br]fourth quadrant, quadrant IV.

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And I guess you have to[br]know your Roman numerals

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a little bit to know that's[br]representing quadrant IV.

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Let's do a couple more of these.

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Plot 8 comma negative[br]4, and select

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the quadrant in[br]which the point lies.

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Well, my x-coordinate[br]is 8 so I go 8

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in the positive x-direction.

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And then my y-coordinate is[br]negative 4, so I go 4 down.

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And this is sitting,[br]again, in not the first,

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not the second, not the third,[br]but the fourth quadrant,

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in quadrant IV.

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Let's do one more of these.

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Hopefully we get a[br]different quadrant.

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So we want to plot the[br]point negative 5 comma 5.

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So now my x-coordinate[br]is negative.

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It's negative 5.

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So I'm going to move to the[br]left in the x-direction.

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So I go to negative 5.

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And my y-coordinate[br]is positive so I go up

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5, so negative 5 comma 5.

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And this is sitting not[br]in the first quadrant,

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but the second quadrant.

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And of course, this is[br]the third and the fourth.

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So this is sitting in[br]the second quadrant.

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Check answer, and[br]we got it right.