### Home > CALC > Chapter 11 > Lesson 11.3.2 > Problem11-113

11-113.

The table below shows the total number of hamburgers sold at various points of the day for a popular fast food restaurant.

 time $t$ hamburgers $h$ $9$ $11$ $12$ $1$ $2$ $4$ $5$ $7$ $3$ $39$ $81$ $251$ $341$ $498$ $611$ $894$

1. Approximately what rate were hamburgers being sold at 10 a.m.? 4 p.m.?

2. When was the rate of sales greatest?