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How do you find the equation, domain, and range using a graph?

How do you find the equation, domain, and range using a graph?-example-1

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Answer/Step-by-step explanation:

For the one on the left, the domain is (-∞,-1)∪[0,0]∪(1,3]

Remember that the domain is what values x are. If the dot is solid, use a bracket, if it is empty, use parentheses.

The range is [-3,-3]∪[-1,-1]∪(2,4]

The equation is a piece-wise function.

When x>-1 f(x)=-3

When x=0 f(x)=-1

When 1<x≤2 f(x)=2x

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