Basic Algebra/Lines (Linear Functions)/Functions and Relations

Vocabulary Lesson y = x^2 Is this a function? versus, y^2 = x Is this a function? The first equation is a function because x has only one y-value, whereas the second equation has many values. In a function, each domain value or x-value should only have one y-value, otherwise it is not a function. Definition: In two sets, A and B, a function is a mapping from A to B. This mapping should satisfy the following conditions in order for it to be a function: All the elements of set A should be paired with any element of set B. An element of set A should not be paired with more than one element of set B. (i.e. the first coordinates of an ordered pairs should not be repeated) Example Problems Practice Games Practice Problems