Remember that a relation is not always a function because a relation only represents a function if all x values are different. So a relation can or cannot be a function, it all depends on the x values. When you graph a relation that is not a function, you don't connect the dots on the graph, you just leave them as points rather than a line since it is not a function.
Here is an example of a relation : (1,5) (1,7)
ReplyDelete