Short answer: No one knows.
Long answer: Some people speculate it's short for "modulus". Others suggest that it's m because the letters m, n, p, etc, are used to represent parameters. But there's no substantial evidence for either claim.
It definitely doesn't come from the French verb to climb, monter. Noted French mathematicians such as Rene Descartes never used m to designate slope. French math courses today use the form y = ax + c.
It is not documented why the letter m was chosen for slope. However, mathematician John Conway suggested that m could mean 'modulus of slope'.
This is true for many reson the answer is that it used to be called "module of slope" but now its just called slope.
If you mean: y = mx+b then the slope of the line is m and the y intercept is b
In slope intercept form, m IS the slope. y = mx + b slope is change in height divided by change in x direction.
If you mean: y = mx+b then 'm' is the slope and 'b' is the y intercept for a straight line equation
It is not documented why the letter m was chosen for slope. However, mathematician John Conway suggested that m could mean 'modulus of slope'.
This is true for many reson the answer is that it used to be called "module of slope" but now its just called slope.
If you mean: y = mx+b then the slope of the line is m and the y intercept is b
M refers to the modulus of the slope.
If the slope of a line is m then the slope of an altitude to that line is -1/m.
The slope of a line perpendicular to one with a slope of m is -1/m.
m = slope
Slope of a line = m slope of perpendicular line = -1/m
If we call the slope m we can say that the slope of the perpendicular line is -1/m In this case as the slope, m, is 13 the slope of the perpendicular is -1/13 or -0.07692307692
slope = m = (∆y) / (∆x) = rise / run
If you mean: y = mx+c then m is the slope and c is the y intercept
It is the slope.