SOLUTION: which two equations represent parallel lines y=2/3x+2 y=- 3/2x -5 y=9x+7 y=9x-2

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Question 125294: which two equations represent parallel lines
y=2/3x+2
y=- 3/2x -5
y=9x+7
y=9x-2

Found 2 solutions by checkley71, mathobsess:
Answer by checkley71(8403) (Show Source):
You can put this solution on YOUR website!
Parallel lines have equal slopes (m).
Thus the 3rd. & 4th. equations are parallel with a slope=9.

Answer by mathobsess(2) (Show Source):
You can put this solution on YOUR website!
y=9x+7 is parallel to y=9x-2

y = 9x +7
"Slope : 9x"
y- intercept : 7

y=9x-2
"Slope: 9x "
y-intercept : -2

The reason y=9x+7 is parallel to y=9x-2 because they have the same slope. Notice that I put the slope of each equation in quotation mark. Just remember, two or more line will always end up parallel if they have the same slope!
Hope that helps