Express the improper fraction 9/4 as a mixed number and state how many whole shapes (each divided into fourths) would be fully shaded when representing 9/4 visually.

$2\frac{1}{4}$ — two whole shapes fully shaded and one quarter of another shaded

9 —nine wholes fully shaded with 4 parts each, because each fourth represents a whole shape

3 —three whole shapes fully shaded and nothing left over, because 9 fourths is three wholes

$1\frac{1}{4}$ — one whole and one quarter shaded