Question

Which graph does NOT represent a function?

Answer 1

Explanation:

A is a quadratic function

C is a linear function

D is logarithmic ln(x)

B seems to be the graph of x = 3, which is not a function .

Answer 2

B

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

`f(x)=y`

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

`x^2=4y`

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.