SOLUTION: Determine whether the graphs of the two equations are perpendicular. y=3x-9 7y=9-x

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Question 612457: Determine whether the graphs of the two equations are perpendicular.
y=3x-9
7y=9-x
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi, 

Determine whether the graphs of the two equations are perpendicular.

Using the standard slope-intercept form for an equation of a line y = mx + b

  where m is the slope and b the y-intercept. 

 y=highlight%283%29x-9

7y=9-x OR y = highlight%28-1%2F7%29x + 9/7

NO: slopes are NOT negative reciprocals of one another