TRANSLATING VARIATION EQUATION INTO VARIATION STATEMENTS.

• z is directly proportional to x and y.
• z varies jointly as x and z.

• h varies directly as V and inversely as the square of r.
• h is directly proportional to V and inversely proportional to the square of r.

• r varies directly as d and inversely as t.
• r is directly proportional to d and inversely to t.