The demand curve is . . . . . . . . representation of a demand schedule, demand curve slopes . . . . . . . . ward from left to right.

The correct answer is: A. graphical, down.

A demand curve is a graphical representation of a demand schedule. A demand schedule is a table that shows the relationship between the price of a good and the quantity demanded of that good. The demand curve slopes down from left to right, which means that as the price of a good decreases, the quantity demanded of that good increases.

Option B is incorrect because the demand curve slopes down, not up. Option C is incorrect because the demand curve is a graphical representation, not a schedule. Option D is incorrect because the demand curve slopes down, not up.