Pennsylvania Keystone Test

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The table below shows some values for a function, f(x). Which of the following statements best describes this function? | x | f(x) | |---|---| | -2| 4 | | -1| 1 | | 0 | 0 | | 1 | 1 | | 2 | 4 |

It is a linear function because the x-values increase at a constant rate. It is not a function because the f(x) values of 1 and 4 are repeated. It is a nonlinear function because the rate of change is not constant. It is a linear function because it passes the vertical line test.

Correct Answer:

It is a nonlinear function because the rate of change is not constant.

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