Donald McRonald often has hamburgers for lunch. The total benefit he gets depends on the number of burgers he eats per week. Here is the relationship between burgers per week and total benefit per week:
burgers
benefit in dollars
1
15
2
22
3
26
4
28
5
29
6
29
Donald's quantity demanded for burgers at a price of $1.75 is how many per week? (Whole numbers only, please).