If the price of pizzas has risen from $4 to $5 at the same time that the price of an hour of aerobics class has risen from $20 to $30, then
A) pizzas have become relatively more expensive.
B) aerobics classes have become relatively more expensive.
C) the relative prices of pizzas and aerobics classes have remained constant.
D) workers' real income must have decreased.

Question

Quizplus · Accepted Answer

The price of pizzas increased by 25% (from $4 to $5), while the price of aerobics classes increased by 50% (from $20 to $30). Therefore, aerobics classes have become relatively more expensive compared to pizzas.

If the Price of Pizzas Has Risen from $4 to $5