Practice Solutions

Explain why the graph does or does not represent a function.

This is a function because it passes the vertical line test (VLT).

Note

This is an absolute value function.

This is not a function because it fails the VLT.

Note

This is a horizontal parabola.

This is a function because it passes the vertical line test (VLT).

Note

This is a floor function.

This is not a function because it fails the VLT.

Note

This is a conic section and a circle.

This is a function because it passes the vertical line test (VLT).

Note

This is a linear function.

This is a function because it passes the vertical line test (VLT).

Note

This is a cubed root function.

Write in terms of f (x).

Write in terms of y.

Curious about what these equations look like when graphed?

Use technology to check it out.