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- 1. Multiple ChoiceY varies directly with x, and y is 84 when x is 16. Which equation represents this situation?y=1344xy=100xy=5.25xy=4/21x
- 2. Multiple ChoiceThe number of hours to paint a house varies inversely with the number of painters working. A 2400-square foot house can be painted in 27 hours by 6 painters. How many painters would need to work in order to paint the house in 18 hours?8 painters10 painters9 painters11 painters
- 3. Multiple ChoiceThe time it takes to fly from Los Angeles to New York varies inversely as the speed of the plane. If the trip takes 6 hours at 900 km/h, how long would it take at 800 km/h?5.33 hours6.75 hours12 hours10 hours
- 4. Multiple ChoiceThe gas pressure in a chamber varies directly with the temperature in the chamber. If the pressure in the chamber is 150 atmospheres (atm) when the chamber is at 50 degrees, what is the pressure in the chamber when the temperature of the chamber is 75 degrees?175 atm200 atm225 atm275 atm
- 5. Multiple ChoiceWhich of the following represents direct variation?y = kxy = k/xy = x/ky = mx + b
- 6. Multiple ChoiceWhich of the following represents indirect variation?y = kxy = k/xy = x/ky = mx + b
- 7. Multiple ChoiceThe 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 60 kg of water. How many kilograms of water are in a person whose mass is 75 kg?50 kg water72 kg water94 kg water150 kg water
- 8. Multiple Choice
The cost per person to rent a mountain cabin varies inversely to the number of people who share the rent. If the cost is $36 per person when 5 people share, what is the cost per person when 8 people share?
$22.50
$57.60
$4.50
$12.50
- 9. Multiple Choice
In a random sampling of 200 cars of a model, 3 have manufacturing defects. If there is a direct variation between the number of cars and the number of defects, how many of 10,000 cars of the same model will have a manufacturing defect?
150
200
250
300
- 10. Multiple ChoiceWhat is the constant (k) in this inverse variation?
y = 400/xxy400Not enough information given - 11. Multiple ChoiceThe value of y varies directly with x. Which function represents the relationship between x and y if y = 14 when x = 6.y=20xy=84xy=7/3xy=3/7x
- 12. Multiple ChoiceGiven that y varies inversely with x, if x =7 and y = 4, what is y when x = 2?14102-14
- 13. Multiple ChoiceA person’s weekly pay is directly proportional to the number of hours worked. Shawn’s pay is $123.00 for 20 hours of work. What is the constant of variation?k = 123k = 20k = 6.15k = 0.16
- 14. Multiple ChoiceThe amount of money earned on a job is directly proportional to the number of hours worked. If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?$2$308$1.57$265
- 15. Multiple ChoiceThe Height of a wave in California varies directly with the seconds that pass by. At 4 seconds, the wave is 6 feet high. How many seconds will give you a wave that is 10 feet high?y = 2/3x66.67
- 16. Multiple ChoiceThe sales at a baseball game vary directly with the number of people attending. If sales for a game are $12,000 when 800 people attend, determine attendance if sales are $30,0001200 people1500 people2000 people2400 people
- 17. Multiple ChoiceThe gallons of water used to take a shower varies directly with the number of minutes in the shower. If an 8 minute shower uses 48 gallons of water, find the constant of variation.1/66848
- 18. Multiple Choice
The distance it takes to stop a car varies directly as the square of the speed of the car. If it takes 112 feet for a car traveling at 40 miles per hour to stop, what distance is required for a speed of 65 miles per hour?
308.05 ft
295.75 ft
296.09 ft
253.5 ft
- 19. Multiple Choice
The variable x is in joint variation with y and z. When the values of y and z are 4 and 6, x is 16. What is the value of x when y = 8 and z =12?
32
64
48
96
- 20. Multiple ChoiceSuppose p varies directly as r, and p varies inversely as t.
t = 20 when p = 4 and r = 2.
Find t when r = 10 and p = -5.80-804-20 - Answer choicesTagsAnswer choicesTags