The first number in each ordered pair is the x-value and the second number is the corresponding y-value.
Domain: { 1, 5, 6, 7} Range: {-8, -7, 4, 5 } Is It a Function? Yes
Practice makes perfect
Consider the given relation.
{(6, -7), (5, -8), (1,4), (7,5)}The domain of this relation is the set of unique x-values of the coordinates and the range is the set of unique y-values.
Domain:& { 1, 5, 6, 7}
Range:& {-8, -7, 4, 5 }
To show a relation of (x,y) ordered pairs as a mapping, list all of the unique x-values in one vertical list and all unique y-values in another vertical list. Then, use arrows to connect corresponding x- and y-values.
Because each domain value is mapped to only one range value, this relation is a function.
