Freckles and Rocky are Miss Nagel's puppies. They each eat their food at a different rate which is shown below. Who eats the fastest and how many more pieces per second?
 Rocky
 Time in seconds (t) 2 5 6 10
 Pieces of dog food eaten (p) 8 20 24 40
 Freckles
 p = 7t
 let p = pieces of food taken
 let t = time in seconds