SOLUTION: Are these lines parallel y=-7x-9 -3y=21x+7

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Question 1021599: Are these lines parallel
y=-7x-9
-3y=21x+7
Answer by engsaoudah(9) About Me  (Show Source):
You can put this solution on YOUR website!
y=-7x-9
-3y=21x+7
these two lines are parallel because they have the same gradient when you write the second equation in the form y=MX+C
-3y=21x+7
divide by -3
y=-7x-7/3
m=gradient x=x-axis C=y-intercept y=y-axis
m=-7 in both cases so the lines are parallel.