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 This topic has been viewed 1782 times and has 2 replies
KARST

United States
Joined: May 21, 2012
Posts: 1
Status: Offline

 Solving Systems of Equations by Graphing Reply to this Post Reply with Quote

i need step by step help on how to do this for example:

y=5/4x-2
y=5/4x-1

 [May 21, 2012 9:56:31 PM] [Link]
pskinner

Joined: Apr 2, 2005
Posts: 797
Status: Offline
 Re: Solving Systems of Equations by Graphing Reply to this Post Reply with Quote

 i need step by step help on how to do this for example:y=5/4x-2y=5/4x-1

You probably mean

y=(5/4)x-2
y=(5/4)x-1

Setting y=y and replacing each y by the left and right sides:

(5/4)x-2=(5/4)x-1

Subtracting the term (5/4)x from both sides (add -(5/4)x to both sides), since (5/4)x-(5/4)x=0, you get:

-2=-1

This is impossible...which means that the two straight lines that these equations represent never meet. So, they must parallel. In fact, the lines each have the slope (5/4) and differ by having the y-intercepts -1 and -2.
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Principal Skinner
 [May 24, 2012 8:05:35 PM] [Link]
rockroy

United States
Joined: May 29, 2012
Posts: 1
Status: Offline

 Re: Solving Systems of Equations by Graphing Reply to this Post Reply with Quote

Great to know this ...... this will surely help me in solving my issues.
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