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Question

The equation of the line(s) passing through the point (−3,5) is

A
x=3
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B
y=3
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C
x=5
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D
y=5
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Solution

The correct options are
A x=3
D y=5
AlineparalleltotheXaxisintersectstheYaxisatthepointP(0,c).IfthelinepassesthroughQ(p,q)then,obviously,c=q.Takethelineasy=mx+c.......(i)whenm=tanθ,θbeingtheanglemadebythelinewiththepositivedirectionofXaxis&c=Yinterceptoftheline.Since(i)isparalleltotheX=axisθ=0otanθ=0m=0.
Thus,theequationoflinewillbey=q
So, for a line parallel to x - axis and passing through (-3, 5). The equation will be:
y = 5
187695_181641_ans_7a818274b7444e61bf0c10acaf4c13c8.png

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