Question

Select the correct locations on the graph. Select the lines that represent functions.

Answer 1

Answer:

The line on the bottom and and the parabola on the top are functions.

Step-by-step explanation:

A function is when there is only one y value for each x value.

The Circle:

Take x = 5 for example. When you look there, there are two y-values for x=5:

y = -1 and y = 1. This is not possible, so the circle is not a function.

The Half-Circle:

Take x = 2 for example. When you look there, there are two y-values for x=2:  y = 2 and y = -1. This is not possible, so the half-circle is also not a function.

The Helix (on the far left side):

Take x = -4 for example. When you look there, there are two y-values for x=-4:  y = 4 and y = -3. This is not possible, so the helix is also not a function.