You can put this solution on YOUR website! The process is the same.
Find the change in y between two points and the change in x.
Divide those two to find the slope.
The absolute value graph will have two slopes:one for the positive region, one for the negative region.
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Here's an example
Two points in the negative slope () region : (0,4) and (2,0)
Two points in the positive slope () region : (2,0) and (4,4)