SOLUTION: Which of the ordered pairs (3,1), (0,-4), (-4,0), (-3,-7) are solutions for the equation x-y=4?

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Question 45019: Which of the ordered pairs (3,1), (0,-4), (-4,0), (-3,-7) are solutions for the equation x-y=4?
Answer by adamchapman(301) About Me  (Show Source):
You can put this solution on YOUR website!
Rearrange +x-y=4 to give the equation of a line on the form "y=mx+c":
y=x-4
Now plot this line and you should notice that only 2 sets of the coordinates given is on that line:
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+x-4%29+
Thhose coordinates are:
(0, -4) and (-3, -7)
I hope this helps.
P.S. I am trying to start up my own homework help website. I would be extremely grateful if you would e-mail me some feedback on the help you received to adam.chapman@student.manchester.ac.uk
Adam