Question

How do I determine if a equation and a graph are a Function ?

Answer 1

"vertical line test" here is an example

Answer 2

if a vertical line crosses graph more than once, not a function. if it crosses at most once, function

Answer 3

thanks, what about of an equation? do i have to graph it?

Answer 4

depends on the equation. if you have y = something in terms of x, you have y as a function of x