After tennis practice, Wong places tennis balls into canisters. He can use up to 10 canisters, and he places exactly 3 tennis balls into each canister. The number of tennis balls placed into canisters is a function of the number of canisters.

Which statements are true regarding the domain and range of this function? Select all that apply.
A
.

The domain of the function is all real numbers from 0 to 10.

B.

The domain of the function is all whole numbers from 0 to 10.

C.

The domain of the function is all whole numbers from 0 to 30.

D.

The range of the function is all multiples of 3 from 0 to 30.

E.

The range of the function is all whole numbers from 0 to 30.

1 answer

To analyze the function described, we note the following:

  • Wong can use up to 10 canisters, which means he can choose to use anywhere from 0 to 10 canisters.
  • He places exactly 3 tennis balls in each canister.

Domain: The domain of the function reflects the number of canisters Wong can use. Since the number of canisters can be any whole number from 0 to 10, the correct statement regarding the domain is:

  • B. The domain of the function is all whole numbers from 0 to 10.

Range: Since Wong places 3 tennis balls in each canister, the total number of tennis balls \( T \) he places can be calculated as: \[ T = 3 \times \text{(number of canisters)} \] If \( c \) is the number of canisters used, then:

  • If 0 canisters are used, \( T = 3 \times 0 = 0 \)
  • If 1 canister is used, \( T = 3 \times 1 = 3 \)
  • If 2 canisters are used, \( T = 3 \times 2 = 6 \)
  • ...
  • If 10 canisters are used, \( T = 3 \times 10 = 30 \)

Thus, the total number of tennis balls \( T \) can be: \[ T = 0, 3, 6, 9, 12, 15, 18, 21, 24, 27, 30 \]

These values represent all multiples of 3 from 0 to 30. The correct statement regarding the range is:

  • D. The range of the function is all multiples of 3 from 0 to 30.

Final True Statements:

  • B: The domain of the function is all whole numbers from 0 to 10.
  • D: The range of the function is all multiples of 3 from 0 to 30.