appears in English in O'Brien (1844) who introduced the equation of a line as , and it can also be found in Todhunter (1888) who wrote "y = mx + c".

Definition

The slope of a line in the plane containing the x and y axes is generally represented by the letter m, and is defined as the change in the y coordinate divided by the corresponding change in the x coordinate, between two distinct points on the line. This is described

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