In more detail
Between (1, 2) and (4, 6) the slope is 4/3 ≈ 1.333 and the distance is 5. A slope of 1 is a 45° angle; roofs and stairs use rise over run, and roads use percent grade.
Glossary
Math & Statistics
Slope
Slope is the steepness of a line: the change in y divided by the change in x between two points.
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See also
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Glossary
Derivative
A derivative measures how fast a function changes at a point; it is the slope of the curve there.
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Glossary
Pythagorean theorem
In a right triangle the square of the hypotenuse equals the sum of the squares of the other two sides: `a² + b² = c²`.