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So, let's review the idea of slope which you might

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remember from your Algebra classes.

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The slope is just a rate of change of a line

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or the rate of change of y

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with respect to x as we go long a line

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and you could also view it

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as a measure of the inclination of a line.

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So, the more inclined the line is,

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the more positive of a slope would have.