Question

How can I determine whether a given graph represents a function?

Answer 1

Se explanantion

Explanation:

Consider the equation `y=mx+c`

You can give any value you chose to `x` and the value of `y` depends on what value you give to `x`

So `y` is the dependant variable and `x` is the independent variable.

What you looking for is this: if the independent variable only maps to one value in the dependant variable then the equation/graph is that of a function.