Define Market demand schedule

In economics, a market demand schedule is a tabulation of the quantity of a good that all consumers in a market will purchase at a given price. At any given price, the corresponding value on the demand schedule is the sum of all consumers’ quantities demanded at that price.

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.