Question 174930
Let E be the Domain{20,30,45,60} then the range is L 
:
L=120-e
:
20: L=120-20=100
30: L=120-30=90
45: L=120-45=75
60: L=120-60=60
:
ordered pairs (20,100),(30,90),(45,75),(60,60)
:
If L is the Domain these ordered pairs would be reversed!!