how do you know when a graph shows a set of ordered pairs that represent a function
Answers
Given a set of ordered pairs we can plot the points on the graph and join them.
The vertical line test helps us find if the graph is a function or not.A relation is a function if there are no vertical lines that intersect the graph at more than one point.
We draw a vertical line cutting through the graph of the relation, and then observe the points of intersection.If there is only one point of intersection for vertical lines drawn then the relation is a function.
If for every value of x there is only one y then the relation is called a function.
When a graph shows a set of ordered pairs that represent a function.
One could set up the relation as a table of well thought-out pairs.
Then, test to see if each building block in the domain is matched with exactly one element in the range.