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- 1. Multiple ChoiceWhat does the Direct Variation Equation look like?y= kxy = mx + by = by = x
- 2. 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
- 3. Multiple Choice
Is the given table a direct variation? If so, what is the constant of variation?Yes; 1/3Yes; 3Yes; 5No - 4. 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
- 5. Multiple ChoiceWhich of the given graphs is a direct variation?ABCD
- 6. Multiple ChoiceClassify the equation:
15x=3yDirect VariationInverse VariationJoint VariationLinear Equation - 7. Multiple ChoiceWhat kind of equation is this?
xy=8Linear EquationDirect VariationInverse VariationJoint Variation - 8. Multiple ChoiceIs the given table a direct variation? If so, what is the constant?Yes; 1/4Yes; 4Yes; 2No
- 9. Multiple ChoiceIs the given table a direct or inverse variation? What is the constant of variation?Direct, 12Inverse, 12Direct, 1/12Inverse, 1/12
- 10. 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
- 11. Multiple ChoiceBoyle’s Law states that, for a fixed amount of gas, the volume of the gas at a constant temperature is inversely proportional to the pressure. If a certain gas occupies 9.84 liters at a pressure of 50 centimeters of mercury (cm Hg), what is the approximate pressure when the volume is increased to 12 liters?39.8 cm Hg41.0 cm Hg43.2 cm Hg45.1 cm Hg
- 12. 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
- 13. Multiple ChoiceThe cost per person to rent a mountain cabin is inversely proportional (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$1.11$12.50
- 14. Multiple ChoiceY is directly proportional to the square of z and inversely proportional to w and xy=kz2/wxy=kz/wxy=wx/kx2y=wx/kz
- 15. Multiple ChoiceWhat ordered pair does a direct variation always go through when graphed?(0, 0)(1, 0)(0, 1)(1, 1)
- 16. Multiple ChoiceDetermine the type of variation:DirectInverseNeither
- 17. Multiple ChoiceTrina's paycheck earnings varies directly as the number of hours she works. If she works 19 hours and earns $187.15, what should she earn if she worked 40 hours?$394$443.25$472.80$512.20
- 18. 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
- 19. Multiple ChoiceTrue or False:
An inverse variation is always a curve and a direct variation is always a line?TrueFalse - 20. Multiple ChoiceTrue or False:
In a direct relationship the constant of variation is the product of x and y, and in an inverse relationship the constant of variation is the quotient of x and y.TrueFalse - Answer choicesTagsAnswer choicesTags