Answer:
A supply - demand curve.
Explanation:
In economics, the curve is an illustration of the price of a good service and the demand in the quantity of that service for a given period of time. On the curve, the price of the product is on the vertical axis (y - axis) and the supply on the horizontal axis (x - axis).
A demand curve shows the law of demand, as it moves from left to right. The relationship is an inverse relationship. For example, if the price increases, the consumers will buy less of the product.
