1. demand:
a list of prices and the quantities that would be purchased at those prices,
holding all other things constant.

2. The demand is the entire curve.

3. Quantity Demanded
quantity demanded:
the quantity bought at a particular price.
It is a point on the demand curve.

4. Equations
Equation of demand:
q=f(p)
Inverse demand:
p=f(q)

5. a greater quantity demanded as a substitute for other goods.
law of demand
A higher price never causes
a greater quantity demanded as a substitute for other goods.

6. the quantities that would be sold or rented at those prices,
Supply
a list of prices and
the quantities that would be
sold or rented at those prices,
holding all else constant.

7. quantity supplied
the quantity sold or rented out at a particular price.
It is a point on the supply curve.