6. Which of the following describes an inverse variation? C, B.D. y 1227487525201510 y 7. If R varies directly as S and inversely as T, which of the following equations describes the relation among the three variables R, S, and T? A. R=kJST B. R=kT/V C. R=kS/T D. R=KST 8. John uses 8 liters of gasoline to travel 100 kilometers, how many liters of pasoline will he use on a trip of 450 kilometers? A. 16 B. 20 C. 36 D. 45 9. The number of days needed in renovating a house varies inversely as the number of mer working. It takes 6 days for 8 men to renovate the house. How many men are needed to A. 12 complete the job in 4days? B. 9 C. 6 D. 3 10.The mass of a rectangular sheet of wood varies jointly as the length and the width. When the length is 30 cm and the width is 20 cm, the mass is 600 grams. Find the mass when the length is 20 cm and the width is 10 cm. A. 100 grams B. 200 grams C. 300 grams D. 400 grams
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