Question

Determine whether the graph represents a function.

Answer 1

are you familiar with the vertical line test?

Answer 2

I've heard of it but I don't really know how to do it.

Answer 3

Look at the picture and think of it this way. for a function to work you need to be able to place a value (for example 'x') into the function and get a distinct value out (for example 'y'). To get more than one output from a function wouldn't make sense. Paraphrased, 'there should be distinct values for y for each x value'

Answer 4

The vertical line test is this:
Slide a vertical line across a graph. If at any point there is more than one point touching that vertical line, the graph fails the vertical line test and is not a function. The graph is undetermined at that value of x