This week I learned what functions are. All functions are relations but some relations are not functions, Ex…

A function is a shape on a graph in which the input number (x) has only one partner as the output (y). As you can see, on the example on the right, the numbers on the left circle (input) have only one partner with the right circle (output). On the example on the left, you can see that one of the input numbers (b) is partners with 2 and 3, which doesn’t make it a function. An ex on a number line..

an example of a function on a graph is this example, as you can see no lines overlap each other on the x axis.

this example shows a relation on a graph, as you can see, there are multiple points that overlap each other on the x axis, making this a relation.