From your line plot, it appears that the amount of milk poured into cereal is represented on the horizontal axis with ticks showing the different quantities:
- 1/2 cup
- 3/4 cup
- 1 cup
The line plot indicates the following:
- There are 4 instances of 1/2 cup.
- There are 3 instances of 3/4 cup.
- There are 5 instances of 1 cup.
Since there are 5 markers at 1 cup, this indicates that Maureen's father poured the most milk on that day, which is 1 cup.
Therefore, the answer is:
1 Cup