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Question 536145:   Write an equation of a line that is perpendicular to y = 2x + 3 and 
    passes through (3,4). 
 Answer by lwsshak3(11628)      (Show Source): 
You can  put this solution on YOUR website! Write an equation of a line that is perpendicular to y = 2x + 3 and 
passes through (3,4). 
** 
Standard form of equation for a straight line: y=mx+b, m=slope, b=y-intercept 
given: y = 2x + 3 
slope of this line=2 
slope of line perpendicular to given line=-1/2 (negative reciprocal) 
equation: y=-x/2+b 
solving for b using coordinates of given point (3,4) 
4=-3/2+b 
b=4+3/2=11/2 
Equation of perpendicular line: 
y=-x/2+11/2 
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