covaries

/ˈkoʊvɛriz/
verb
  1. Third person singular of covary: two or more variables change together in a related way.
    • In biology, the size of a predator population often covaries with the size of its prey.
    • The amount of rainfall covaries with the growth rate of the crops.
    • As the price of gas rises, the demand for public transit covaries with it.
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