In the graph what information does the middle row of pizzas give?

Women's residence hall ordered 54 pizzas

Explanation

We will count the number of complete pizza symbols that appear in the middle row of the graph, and we will estimate what fractional part of a pizza symbol also appears in that row.  The key indicates that each complete  pizza symbol represents one dozen (12 pizzas).

The middle row contains 4 complete pizza symbols and what appears to be \( \frac12 \) of another.  This means that the women's residence hall ordered 4 • 12, or 48 pizzas, plus approximately \( \frac12 \) of 12, or about 6 pizzas.  This totals 54 pizzas.