SOLUTION: 2x+y=8 and y= -2x-4 are they parallel or perpendicular

Question 498585: 2x+y=8 and y= -2x-4
are they parallel or perpendicular
Found 2 solutions by stanbon, solver91311:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
2x+y=8 and y= -2x-4
are they parallel or perpendicular
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Write both in slope-intercept form:
y = -2x-4
y = -2x+8
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both have slope = -2 but different intercepts so they are parallel.
Cheers,
Stan H.
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Calculate the slope of each line (One of them you can tell simply by inspection). If the slopes are equal, but the constant terms are different, then the lines are parallel. If the slopes are equal AND the constant terms are equal, then they are the same line. If the slopes are negative reciprocals, then the lines are perpendicular. If neither, then the lines are neither parallel nor perpendicular.

John

My calculator said it, I believe it, that settles it

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