When is a relation a function?
Share
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
A relation is a function if, for every input (x-value), there is exactly one output (y-value). This means that no x-value can be paired with more than one y-value. You can check this by looking at a set of ordered pairs or a graph; if any vertical line crosses the graph at more than one point, it is not a function.