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Easy: Ordered pairs
The domain is the set of inputs (x-values) and the range is the set of outputs (y-values). For a list of ordered pairs, list each x and each y once. For a square root, the inside must be at least 0, so solve inside ≥ 0. For a fraction, the denominator can't be 0, so every real number except the value that makes it 0 is in the domain.
Find the domain, and the range when the relation is a list of pairs.
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Two things in Algebra 1: you can't divide by zero, so x can't make a denominator 0, and you can't take the square root of a negative, so the expression under the root must be at least 0.
The domain is the set of x-values and the range is the set of y-values. List each value once, usually in increasing order.
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