Which graph does not represent a function?

B

Step-by-step explanation:

We are given that four  graphs

We have to find that which graph does not represent  a function.

Function: It is defined as  mapping between x and y .

When we substitute  x in the given function then we get corresponding value of x is y.

It is written as

First graph is the graph of parabola along y- axis .The equation of parabola along y- axis is given by

By definition of function,  it represents function.

B.The given graph is a vertical line

Equation of vertical line,x=a

We have x=3

There are no value of y.

Because the value of y on x - axis is 0.

Hence, the graph does not represent a function by the definition of function.

C.The given graph is an equation of  a line.

Equation of line represent a function because we get the value of y corresponding of x.

D.The given graph represent the graph of logarithm function.

It is always represent a function by the definition of function.

Hence, option B is true.

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step-by-step explanation: