-15 < 3n < 6
Divide all sides by 3
-5 < n < 2
Now you need all integers between -5 and 2.
-4, -3, -2, -1, 0, 1
10 yards. The amount of yards is 1 third the amount of feet so you just divide 30 by 3 to get the amount of yards
-a) function 2, function 4
-b) function 4
-c) function 2