The graph of a quadratic function fis shown on the grid. Which of these best represents the domain of f?

Answer 1

The domain of a quadratic function is all real numbers. This is because a quadratic function is defined for all real values of x. In the graph shown, the parabola extends infinitely in both directions on the x-axis, indicating that the function is defined for all real numbers. Therefore, the best representation of the domain of f is (-∞, ∞).