The function $\displaystyle {g{{\left({w}\right)}}}={18}{w}-{w}^{{2}}$ can be used to determine the area, in square feet, of Mary's garden. In the function, $\displaystyle {w}$ represents the width, in feet, of the garden.

The maximum Select an answer width area of the garden is $\displaystyle {f}{t}^{{2}}$