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For each graph below, state whether it represents a function

For each graph below, state whether it represents a function-example-1

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The graphs that represent functions:

  • 3rd graph.
  • fourth graph.
  • sixth graph.

How to know if a graph represents a function?

When we have a graph and we want to see if it is a function or not, we need to use the vertical line test.

it says that if we can't find a vertical line that intercepts the graph more than once, then we have a function.

For example, for the first line:

x = 0

Intercepts two points, so this is not a function.

With this in mind, the options that are functions are:

3rd graph.

fourth graph.

Last graph.

User Thami
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