Below is a graph that shows the eating habits of a goldfish in an aquarium over a two day period.
at which of the following times during the next day (wednesday) will the fish be most actively seeking food?
a 9 p. m.
b 3 a. m.
c 3 p. m.
d 9 a. m.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)