Jordan is kayaking upstream. The following equation models his speed: f(x) = 2x2 − 4x − 9, where x is Anna's speed relative to land. What is the domain of the function? x ≥ 1 x ≤ −4 x ≥ −9 All real numbers
Accepted Solution
A:
Answer:All real numbersStep-by-step explanation:The given equation is:[tex]f(x) = 2 {x}^{2} - 4x - 9[/tex]where x is Ana's speed.This is a quadratic function.A quadratic function is a polynomial function.All polynomial functions are are continuous and defined for all real values of x.Therefore the domain of [tex]f(x) = 2 {x}^{2} - 4x - 9[/tex]is all real numbers.