SOLUTION: Which equation has a graph that is perpendicular to the graph of 7x = 14y-8? 1- y=-2x-7 2- y= -1/2x+4 3-y= 1/2x+1 4-y=2x+9

Algebra ->  Graphs -> SOLUTION: Which equation has a graph that is perpendicular to the graph of 7x = 14y-8? 1- y=-2x-7 2- y= -1/2x+4 3-y= 1/2x+1 4-y=2x+9      Log On


   

Question 930443: Which equation has a graph that is perpendicular to the graph of 7x = 14y-8?
1- y=-2x-7
2- y= -1/2x+4
3-y= 1/2x+1
4-y=2x+9
Answer by algebrahouse.com(1659) About Me  (Show Source):
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Perpendicular lines have slopes which are negative reciprocals.

Slope-intercept form is y = mx + b
m is the slope
b is the y-intercept

7x = 14y - 8
7x + 8 = 14y {added 8 to each side}
(1/2)x + (8/14) = y
slope is 1/2

A line perpendicular would have a slope of -2 {the negative reciprocal of 1/2}

#1 y = -2x - 7 {it is the only one with a slope of -2}

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