SOLUTION: What is the slope of the line that passes through the points (-5,4) and (15,-4)?

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Question 620565: What is the slope of the line that passes through the points (-5,4) and (15,-4)?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Note: is the first point . So this means that x%5B1%5D=-5 and y%5B1%5D=4.
Also, is the second point . So this means that x%5B2%5D=15 and y%5B2%5D=-4.


m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29 Start with the slope formula.


m=%28-4-4%29%2F%2815--5%29 Plug in y%5B2%5D=-4, y%5B1%5D=4, x%5B2%5D=15, and x%5B1%5D=-5


m=%28-8%29%2F%2815--5%29 Subtract 4 from -4 to get -8


m=%28-8%29%2F%2820%29 Subtract -5 from 15 to get 20


m=-2%2F5 Reduce


So the slope of the line that goes through the points and is m=-2%2F5