SOLUTION: I do not understand how to work this problem. It says: Consider the line -9x-4y=-5 What is the slope of a line parallel to this line? What is the slope of a line perpendic

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Question 675838: I do not understand how to work this problem. It says:
Consider the line -9x-4y=-5
What is the slope of a line parallel to this line?
What is the slope of a line perpendicular to this line?

Answer by ReadingBoosters(3246)   (Show Source): You can put this solution on YOUR website!
Take the equation -9x-4y=-5 and rearrange it to the y=mx+b format
-4y = -5 + 9x
y =
y = x +
...
the slope of this line is
...
a parallel line will have the same slope :
...
a perpendicular line will have the negative inverse slope:
.....................
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