Type the correct answer in the box. Use numerals instead of words. Mr. Murphy's class wants to know how many rubber bands they can add to a rubber band ball before it cannot hold any more. They add
rubber bands to the ball each day. The table below shows how many rubber bands, y, are in the rubber band ball after x days.
Day
3
8
14
21
Rubber
Bands
68
143
233
338
The rate of change of the linear function represented by the table is
rubber bands a day.