SOLUTION: Is the line parallel, perpendicular or neither?? y = x + 7 y = -x + 2 How do I figure this out?? Thanks for helping!

Question 190932: Is the line parallel, perpendicular or neither??
y = x + 7
y = -x + 2
How do I figure this out?? Thanks for helping!
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Is the line parallel, perpendicular or neither??
y = x + 7
y = -x + 2
How do I figure this out??
----------
Both are in the form y = mx +b where b is the slope.
The slope of the 1st Eq. is "1".
The slope of the 2nd Eq. is "-1".
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The slopes are not the same so the lines are not parallel.
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The product of the slopes is 1*-1 = -1 so the lines are perpendicular.
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Cheers,
Stan H.
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