![one to one function graph one to one function graph](https://media.nagwa.com/289170183160/en/thumbnail_l.jpeg)
![one to one function graph one to one function graph](https://i.ytimg.com/vi/d8Hd5EhcVNk/maxresdefault.jpg)
We can also use other letters too, such as g(x), h(x), etc. We use function notation f(x) to show that each y-value is a function of an x-value. So for an x-value on the graph, there are two y-values. Graph C is not a function because the vertical cuts the graph twice. If any line drawn parallel to the y-axis cuts the graph only once, then the graph represents a function.
![one to one function graph one to one function graph](https://us-static.z-dn.net/files/d19/4711a1dc73892901f351836d0a2532cd.png)
One way to decide whether or not a graph represents a function is to use the vertical line test. If a rule or a formula produces only one y-value for each x-value, then we have a function.Ī function is a relationship between x and y, where for every x-value there is only one y-value. For every x-value on this graph, there is only one y-value. If we extend the domain so that x∈핉, we get the graph for y = 2x – 1. We can plot these values on the Cartesian plane. The input values or x-values are the elements of the domain of this set and the output values or y-values are the elements of the range of this set. So for every x-value, we multiply it by 2 and subtract 1 to find the corresponding y-value. In this flow diagram, the rule is y = 2x – 1 The x-values are the input values and the y-values are the output values. So there is a relationship between the x-values and the y-values that is described by the rule. If you are given a set of x-values, you can work out the set of y-values or answers that came from using a given rule on each x-value.