Select the lines that represent functions.

All of them except the squiggly one and the vertical one

Step-by-step explanation:

The rest are functions, two of them are lines, and the curved swoop is a parabola, which is also a function

Function is a set of relation without same or repetitive domain. Because we are checking if the following graphs are function or not. It is easier to do line test.

How to check if the graphs are function.

Overall, the graphs that are not function are the vertical line and the vertical curve graph.

Feel free to ask if you are confused.