SOLUTION: I am trying to figure finding slopes, if it exists, of the line containing the pair of points. However I do not know what the and in the equation means? for example (8,4)and(9,-9

Algebra ->  Graphs -> SOLUTION: I am trying to figure finding slopes, if it exists, of the line containing the pair of points. However I do not know what the and in the equation means? for example (8,4)and(9,-9      Log On


   

Question 337161: I am trying to figure finding slopes, if it exists, of the line containing the pair of points.
However I do not know what the and in the equation means? for example (8,4)and(9,-9)
trying to find slope m=
Can you help explain what this is please? Thanks Mary
Found 2 solutions by jim_thompson5910, stanbon:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
m=%28y%5B2%5D-y%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29 Start with the slope formula.


m=%28-9-4%29%2F%289-8%29 Plug in y%5B2%5D=-9, y%5B1%5D=4, x%5B2%5D=9, and x%5B1%5D=8


m=%28-13%29%2F%289-8%29 Subtract 4 from -9 to get -13


m=%28-13%29%2F%281%29 Subtract 8 from 9 to get 1


m=-13 Reduce


So the slope of the line that goes through the points and is m=-13

If you need more help, email me at jim_thompson5910@hotmail.com

Also, feel free to check out my website.

Jim

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
(8,4)and(9,-9)
trying to find slope m=
==============
slope = (change in y)/(corresponding change in x)
----------------
m = (-9-4)/?
Notice the order in which the y-values were selected.
You MUST use the same order in selecting the x-values
m = (-9-4)/(9-8)
m = -13/1
m = -13
==============
Cheers,
Stan H.