Which of the following statements about one to one functions is false?

[peterjackson5123]

1. The graph passes the horizontal line test
2. Every output comes from one and only one input
3. The function x^2 is a one to one function
4. The graph passes the vertical line test

 

[Deleted member 4993]

1. The graph passes the horizontal line test
2. Every output comes from one and only one input
3. The function x^2 is a one to one function
4. The graph passes the vertical line test

Please show us what you have tried and exactly where you are stuck.

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[Dr.Peterson]

1. The graph passes the horizontal line test
2. Every output comes from one and only one input
3. The function x^2 is a one to one function
4. The graph passes the vertical line test

For (3), you have to decide whether x^2 is a one-to-one function. Is it?

For the others, you have to decide whether every one-to-one function fits the description. Think about the definitions and tests for "one-to-one" and "function".

The more you tell us about your thinking, the more effectively we can help.