Question 23700: Directions:solve each system of linear equations by graphing.
3x-y= 7
y+3x-7
Can you explain how to do it.
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! There is no equal sign in the second equation, so it can't be graphed. I'll take a guess, but you may need to re-post the question.
3x-y = 7 is in standard form, so use the two intercepts method to graph it.
Let x =0, then -y = 7, so y =-7
Let y =0, then 3x = 7, so x=  or approximately 2.3
I'll take a guess that the second equation was supposed to be y =3x - 7. This is in slope-intercept form, so the y-intercept is -7, and the slope is 3/1.
Graph these two lines and it should look like this:
As you can see from this graph, the two lines are actually the same line. The solution is the entire line. There are infinitely many solutions.
R^2 at SCC
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