Imagine that a line on a Cartesian graph is approximately the distance *y* in feet a person walks in *x* hours. What does the slope of this line represent?

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The slope of a straight line is the rise divided by the run. In this case, the "rise" is the distance y in feet, and the "run" is the time x in hours. This means the the slope is

`m=y/x`

which is given in units of feet per hour.

**The slope in this line represents the speed of the person walking in feet per hour.**

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