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what is the slope formula used for. M and want to find other points on the line. The slope is one of the essential characteristics of a line and helps us measure the rate of change.
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The formula for finding the slope of a line on a coordinate plane is y2 - y1 x2 - x1 where x2 y2 and x1 y1 represent two distinct points on the line. The slope of a straight line is the ratio of the change in y to the change in x also called the rise over run. X and Y are the sample means the averages of the known xs and the known ys.
Now we can write a general formula for slope.
Slope Change in y Change in x y 2 y 1 x 2 x 1. The slope of a straight line is the ratio of the change in y to the change in x also called the rise over run. One point on the line. There is no clear answer to the question why the letter m is used for slope but its earliest use in English appears in OBrien 1844 who wrote the equation of a straight line as y mx b and it can also be found in Todhunter 1888 who wrote it as y mx c.
