Does anyone know these?

Question

Does anybody know these? Thanks for help.

1. The following is which type of variation: t varies directly as q and inversely as s.

_____

A. Direct Variation

B. Inverse Variation

C. Joint Variation

D. Combined Variation

2. The following is which type of variation: the weight of an object varies inversely as the square of the distance of the object from the center of the earth.

_____

A. Direct Variation

B. Inverse Variation

C. Joint Variation

D. Combined Variation

3. The following is which type of variation: the volume of a right cylinder varies jointly as its height and the square of the radius.

_____

A. Direct Variation

B. Inverse Variation

C. Joint Variation

D. Combined Variation

4. The following is which type of variation: p = 3s.

_____

A. Direct Variation

B. Inverse Variation

C. Joint Variation

D. Combined Variation

Answer 1

1. The following is which type of variation: t varies directly as q and inversely as s.

_____

D. Combined Variation

2. The following is which type of variation: the weight of an object varies inversely as the square of the distance of the object from the center of the earth.

_____

B. Inverse Variation

3. The following is which type of variation: the volume of a right cylinder varies jointly as its height and the square of the radius.

_____

C. Joint Variation

4. The following is which type of variation: p = 3s.

_____

A. Direct Variation