Use the following to answer questions:
Figure: The Demand Curve 
-(Figure: The Demand Curve) Look at the figure The Demand Curve. If the price is $3, total revenue is _____. If the price is $4, total revenue is _____.
Definitions:
Female Reproductive System
The ensemble of organs within a female's body responsible for reproduction, including the ovaries, fallopian tubes, uterus, and vagina.
Enzyme-Filled Sac
A structure within a cell, containing enzymes, that is involved in processing molecules or in metabolic reactions.
Sperm
The male reproductive cells or gametes in sexually reproducing organisms, responsible for fertilization.
Fertilization
The process in which an egg unites with a sperm.
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