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Question

Which among the following relations between x,y doesn't represent a function

A
(x1)2+(y3)2=52,x[4,6],yR
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B
y2=4x,x[0,),yR
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C
x2=4y,x,yR
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D
y=2x+52,x,yR
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Solution

The correct options are
A (x1)2+(y3)2=52,x[4,6],yR
B y2=4x,x[0,),yR
We know that if a vertical line parallel to y axis for the curve cuts the graph at one point then it represents a functionHere vertical line cuts the graph at more than one point
It is not a function

Vertical line is cutting the graph at more than one point
It is not a function

Vertical line is cutting the graph at one point

It is a function

Vertical line is cutting the graph at one point only.

It is a function

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