Question

Which graph represents a function?

Answer 1

The last option (The line going straight left to right)

Explanation:

For a graph to represent a function, the line must pass the vertical line test.

I've attached an image to look at how the vertical line test works.

Answer 2

the last one

Explanation:

use the horizontal line test to find out if its a function

for more information Google horizontal line test

hope this helps :)