SOLUTION: Solve the equations below simultaneously using the graphical method: (Hint: Draw up a table of coordinates for each equation and plot on the same set of axes. Use values betw

Algebra ->  Graphs -> SOLUTION: Solve the equations below simultaneously using the graphical method: (Hint: Draw up a table of coordinates for each equation and plot on the same set of axes. Use values betw      Log On


   

Question 900236: Solve the equations below simultaneously using the graphical method:

(Hint: Draw up a table of coordinates for each equation and plot on the same set of axes. Use values between -2 and 5)
y-2x=1
x+y=10

I'm having so much trouble understanding this question, Please help.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Arrange each equation into general form, solved for y.

You have y=2x+1 and y=-x+10.


TABLE FOR THE x y VALUES
------------------------------
x______y=2x+1______y______y=-x+10________y
-2________________-3____________________12
-1________________-1____________________11
0__________________1____________________10
1__________________3____________________9
2__________________5____________________8
3__________________7____________________7
4__________________9____________________6
5__________________11___________________5

The graph of the lines will be like this:
graph%28300%2C300%2C-3%2C6%2C-4%2C15%2C2x%2B1%2C-x%2B10%29

Showing with both scales the same size,
THIS IS A BETTER GRAPH:
graph%28300%2C300%2C-4%2C12%2C-4%2C12%2C2x%2B1%2C-x%2B10%29