3a) Lilly has been collecting 5 and 10 dollar bills. The total amount of money she
has saved so far is $210. The graph shows a possible combination of 5 and 10
dollar bills Lilly has. What do the coordinates (0, 21) and (42,0) mean in this
situation?
(0,21)
Number of $10 bills
10
(42,0)
20
30
50
Number of $5 bills
We