Domain and Range of a Relation: Pairs, Graphs and Formulas
The domain of a relation is its set of x-values; the range is its set of y-values. For ordered pairs or a table, collect each coordinate separately and list each distinct value once. For a graph, include only values reached by actual points—not every value between the extremes. On this page Use ordered pairs or […]
How to Find the Domain and Range of Quadratic Functions
The domain of every quadratic function is all real numbers. The range depends on the vertex (h, k): if the parabola opens upward (a > 0), the range is y ≥ k; if it opens downward (a < 0), the range is y ≤ k. So the whole job is finding the vertex and checking […]
