each example has a independent variable x and dependent variable y indicate which one is which in the example rainfall;crop yield  taxi fee ; length of ride

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embizze | High School Teacher | (Level 2) Educator Emeritus

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The dependent variable generally changes value in response to a change in the independent variable. In some situations you can treat either variable as dependent/independent. Often you can think of which variable do you control.

(1) rainfall;crop yield  In general the more rain the better the crop yield. (Except in cases of flooding, or inability to plant crops at the beginning of the season, etc...) However, better crop yields do not "cause" more rain -- the rain either comes or not, independent of the crop yield. The crop yield depends on the rain.

Rain - independent  Crop yield - dependent

(2) Taxi fee; length of ride Again the amount of the fee increases as the length of the ride increases.

Taxi fee - dependent  Length of ride - independent

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