Use the table to calculate marginal utility, and then answer two questions. Instructions: Enter your responses as a whole number. If you are entering any negative numbers be sure to include a negative sign (-) in front of those numbers.
Popcorn Consumption Total Utility Marginal Utility
0 0 --
First box 20
Second Box 35
Third box 44
Fourth box 49
Fifth box 48
Sixth box 38
a. With which box of popcorn does marginal utility first diminish?
1 fifth box
fourth box
sixth box
third box
second box
first box
b. With which box does marginal utility become negative?
second box
first box
fourth box
fifth box
third box
sixth box.