Question

Select the graph(s) which is/are not a function.

• A. Can't be determined
• B. Graph A
• C. Graph C
• D. Graph B

Answer 1

The correct option is B Graph A

Consider Graph A:


If we pass a vertical line over it, more than one point of the graph intersects vertical line at lot of instance. This means that is not a function.

Consider the Graph B:


If we pass a vertical line over it, there is no instance at which more than one point of the graph intersects the vertical line. This means that it is a function.

Consider the Graph C:


If we pass a vertical line over it, there is no instance at which more than one point of the graph intersects the vertical line. This means that it is also a function.

∴ Graph A is not a function.