Hi,
the idea is examining the ordered pairs (x,y) as listed for the function f(x)
Given f(x) = {(2,3),(3,),(-1, ),(0,-1)
State the domain of f(x) {2,3,-1,0} || Allowable x- values
State the range of f(x) {3,7,5,-1} || Allowable y-values
Find f(3)= 7
f(-1)= 5