What is the domain of f(x) = x² + 2x + 1 ?
Domain is the set of x-values, or the "input"
Range is the set of y-values, or the "output"
As you'll notice in the graph,
The domain {set of x-values} consists of
all real numbers.
The range {set of y-values} consists of
all real numbers greater than or equal to 0.
- Algebra House
