Question

The cost of textbooks for a school increases with the average class size. Identify the independent and dependent quantity in the situation.


cost; number of classes

average class size; cost

number of classes; average class size

cost; average class size

Answer 1

The independent is the average class size and the dependent is the cost of the textbooks.

Since the cost changes as the average class size changes, this means that the cost is the effect and the size is the cause; the cost depends on the size.