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

Algebra ->  Linear-equations -> 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      Log On


   

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) About Me  (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 = %289%2F-4%29x+%2B+%28-5%2F-4%29
y = -9%2F4x + 5%2F4
...
the slope of this line is -9%2F4
...
a parallel line will have the same slope : -9%2F4
...
a perpendicular line will have the negative inverse slope: 4%2F9
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