1) The number of kilograms of water in a person's body varies directly as the person's mass. A person with a mass of 90 kg contains 60kg of water. How many kilograms of water are in a person whose mass is 75kg? a) 50 kg water b) 72 kg water c) 94 kg water d) 150 kg water 2) y varies directly with x, and y is 84 when x is 16. What is the constant of proportionality? a) y= (21/4)x b) k=21 c) 5.25 d) k= 4/21 3) y varies directly with x, and y is 16 when x is 32. Which equation represents this situation? a) y= 32x b) y= 16x c) y= 2x d) y= (1/2)x 4) In a direct variation, y= 39 when x=3. Find the value of y when x= 2. a) 26 b) 3 c) 58.5 d) 2 5) y varies directly as x, if y= 8 when x= 4, find y when x = 48. a) 88 b) 24 c) 48 d) 96

Direct Variation

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