Using vertical and horizontal line tests to determine if graphs are one-to-one functions

In this example problem, we look at a series of graphs and try to determine if they represent one-to-one functions. To do so, we use the vertical line test to first determine if they represent functions at all. If they do not pass the vertical line test, then they cannon be one-to-one 1-1 functions. If they pass this test, we move on to the horizontal line test. If we cannot draw a horizontal line that will intersect the graph in more than on place, then we determine that the graph is that of a one-to-on 1-1 function. This will also mean that it has an inverse.