SOLUTION: how do i determine whether the graphs of the equation are perpendicular lines? 4y=x+5 9y+3x=2

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Question 72380This question is from textbook
: how do i determine whether the graphs of the equation are perpendicular lines?
4y=x+5
9y+3x=2 This question is from textbook

Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
To find if they are perpendicular you need to put them in slope-intercept form and find the slope of each;
4y=x+5
y=1%2F4x+5%2F4
slope = 1%2F4
9y+3x=2
9y=-3x+2
y=-3%2F9x+2%2F9
slope = -3%2F9=-1%2F3
For two lines to be perpendicular, the condition is that the slopes are negative reciprocals.
So these are not perpendicular
:)