SOLUTION: Write the equation of the line passing through (–4, –10) and (5, –10).Please.

Algebra ->  Equations -> SOLUTION: Write the equation of the line passing through (–4, –10) and (5, –10).Please.      Log On


   

Question 46716: Write the equation of the line passing through (–4, –10) and (5, –10).Please.
Answer by adamchapman(301) About Me  (Show Source):
You can put this solution on YOUR website!
I have provided an example here. Just plug in your own values and follow my method. I promise it will work
The eqautaion y=-mx%2Bb is the equation of a straight line. m is the gradient of that line, and b is the y-axis intercept. The y-axis intercept is the value of y when x=0.
Try to remember this equation: %28y-y%5B1%5D%29%2F%28y%5B2%5D-y%5B1%5D%29=%28x-x%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29
where (x1,y1) and (x2,y2) are points on the line. It is an EXTREMELY important equation.
Lets do an example:
(x1,y1)=(1,2)
(x2,y2)=(3,4)
substitute these values into %28y-y%5B1%5D%29%2F%28y%5B2%5D-y%5B1%5D%29=%28x-x%5B1%5D%29%2F%28x%5B2%5D-x%5B1%5D%29:
%28y-2%29%2F%284-2%29=%28x-1%29%2F%283-1%29 and then rearrange to give y in terms of x:
%28y-2%29%2F2=%28x-1%29%2F2
y=x%2B1
so comparing with "y=mx+b", m=1 and b=1.
I hope this helps,
Adam.
P.S. please check out my website, it may be helpful to you:
http://www.geocities.com/quibowibbler