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I assume your are asking how to calculate the slope of a line. Pick two points: (x1, y1) and (x2, y2). The slope is: (y2-y1) / (x2-x1). This is also referred to as rise over run, or change in y over change in x. Be sure to simplify the fraction all the way!

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You calculate (difference of y-coordinates) / (difference of x-coordinates) for two different points.For a straight line, you can calculate this for any two points.

For any other curve, to get the slope at a specific point you must analyze what happens when the two points (near the desired point) get closer and closer together. This is called taking the LIMIT, and it takes us to the concept of DERIVATIVE. Quite often, you can simply apply standard formulae to calculate the derivative.

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Q: How do you calculate the slope in algebra?
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