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 […]
How to Find Domain and Range of a Function?
Finding the domain and range of a function tells you exactly which inputs a function will accept and which outputs it can produce. The domain is the set of all valid x-values, while the range is the set of all resulting y-values. Identifying domain and range is a foundational skill in Algebra 1 that you […]