SOLUTION: how do you find the slope of a line when your only given two points? we are required to solve it algebralicly with out graphing. i know that there is an equation to solve it but im

Algebra ->  Linear-equations -> SOLUTION: how do you find the slope of a line when your only given two points? we are required to solve it algebralicly with out graphing. i know that there is an equation to solve it but im      Log On


   

Question 255309: how do you find the slope of a line when your only given two points? we are required to solve it algebralicly with out graphing. i know that there is an equation to solve it but im not sure what it is or how it works.
Answer by drk(1908) About Me  (Show Source):
You can put this solution on YOUR website!
Suppose you are given 2 coordinates: A (x1,y1) and B (x2,y2). We can find the slope with the dollowing equation:
m+=+%28y2-y1%29%2F%28x2-x1%29
--
EX: A(1,4) B (-3,9)
using the slope formula we get
m+=+%289-4%29%2F%28-3-1%29 = 5/-4
so
m = -5/4