I'm a college student with an college level Intermediate Algebra question:
Which are the following are not functions?
Your help is greatly appreciated.
Try graphing these relations and applying the vertical line test. Imagine a series of vertical lines superimposed over the graphs. If any of these vertical lines goes through the graph more than once, it is not a function. If each vertical line goes through the graph at most once, it is a function.
Hope this helps,