Question

Lots of points.

1 function or not


please explain when you get the answer

2
function or not

please explain when you have the answer

3
function or not

please explain when you have the answer

Answer 1

1. Not a function.

2. This is a function.

3. This is a function.

Explanation:

1. 13 maps on to 4 and -4 so not a function.

2 and 3 - these both pass the vertical line test so they are functions.