## Algebra: A Combined Approach (4th Edition)

Domain = {0, $\frac{1}{2}$} Range = {$\frac{1}{4}$, $\frac{7}{8}$, $\pi$} This relation is not a function
Domain = set of all the first elements of the ordered pairs Range = set of all the second elements of the ordered pairs $\frac{1}{2}$ appears as a first element twice; thus, this relation is not a function