Question

Anna is swimming against the ocean current. The following equation models her speed: f(x) = x2 − 6x +1, where x is Anna's speed relative to land. What is the domain of the function?

x ≥ 1
x ≤ −3
x ≥ −6
All real numbers

Answer 1

Answer: All real numbers

Explanation:

I took the test

Answer 2

All real numbers

Explanation:

we have the function

`f(x)=x^2-6x+1`

This is a vertical parabola open upward

The vertex represent a minimum

Remember that

The domain of a function is the set of all possible values of x

The quadratic functions are continuous and defined for all real values of x.

therefore

The domain of the function f(x) is the interval (-∞,∞)

That means

All real numbers