The product life-cycle curve that describes the sales pattern of a new product over time (growing slowly during its introduction and then squirting upward rapidly during its growth stage and finally plateauing or slowing down considerably as the market becomes saturated) is an example of which type of relationship?

curvilinear relationship

Explanation:

Based on the information provided within the question it can be said that this is an example of a curvilinear relationship. This term refers to a type of relationship between two variables in which, when one increases the other one does as well, up until a set point. Once the first variable hits that point it can continue to increase but the second variable will begin to decrease. In this scenario the market can continue to grow and will cause the new product to grow as well, but once the market becomes saturated with similar products, the sales of the product will start to decline even though the market is still growing.

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