The slope of a line is the ratio of its rise to its run.
The rise is the vertical change between two points on a line.
The difference between the y-coordinates creates the rise.
In this example, the difference between the y-coordinates of points A and B is 3 - (-3) = 6.
The run is the horizontal difference between two points or the difference between the x-coordinates.
In this example the difference is -3 - 1 = -4.

 

 

In this example, the slope of the line is  .


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