Before we examine specific cases of demand and supply both shifting, we need to understand what is meant by an indeterminate change.

We will use the word indeterminate in this context as equivalent to "unpredictable." If we say that a change is indeterminate, we simply mean that we can't be sure in advance about the direction of the change.

As we will see, if both supply and demand change, we will be able to predict the direction of change for either price or quantity, but not both. One will always be indeterminate; which one will depend on how demand and supply change.

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