# Why is slope represented by the letter m?Any help is appreciated.

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I believe rozo711 has come closest to an accurate answer. I just have one or two pieces to add and the link below will help. I believe slope is represented by an 'm' due to the Latin word '* modus*' which means measure. See the link below for more details.

**Sources:**

It is said it is because the m stood for modulus.

In our system, the first letters of

the alphabet, a, b , c... represent the constants, the last

letters, x, y, z represent the unknown variables and the middle

letters, m, n, p... represents the parameters. When we started the

explanations of slope, it was in studying the first degree

equation: y = mx + b. x and y were the variables, b was fixed and

considered as a constant, and what was appended to the

coefficient of x as its value varied. So it was a parameter and

that is why we used m.

**Sources:**

because m was once called modulus.

The slope is rise over run