Direct Variation i Respond 1 Which graph represents

Direct Variation i. Respond

1. Which graph represents a direct variation? A B A. ) Graph A B. ) Graph B C. ) Graph C D. ) Graph D C D

2. Which table represents a direct variation? Table 2 Table 1 x y 2 4 2 8 3 6 3 12 B. ) Table 2 6 18 C. ) Table 3 y x y D. ) Table 4 x 2 6 2 4 6 2 3 6 6 12 A. ) Table 1 Table 4

3. The variables x and y vary directly. If x=4 when y=24, find y when x=5 A. ) y=6 B. ) y=30 C. ) y=1/6 D. ) y=35

4. The height a ball bounces varies directly with the height from which it is dropped. A ball bounces 20 m when it is dropped from 80 m. How high will the ball bounce if it is dropped from 100 m? Write the equation. A. ) y= (1/4)x B. ) y= (1/2)x C. ) y= 4 x D. ) y= 2 x

5. The height a ball bounces varies directly with the height from which it is dropped. A ball bounces 20 m when it is dropped from 80 m. How high will the ball bounce if it is dropped from 100 m? A. ) 25 m B. ) 20 m C. ) 400 m D. ) 250 m

6. The variables x and y vary directly. Use the given values to write an equation. x=9 y=3 A. ) y=3 x B. ) y=27 x C. ) y=(1/3)x D. ) y=9 x

7. The variables x and y vary directly. Use the given values to find k. x=4 y=24 A. ) k=6 B. ) k=1/6 C. ) k=4 D. ) k=1/4

8. The variables x and y vary directly. Use the given values to write the equation. x=4 y=24 A. ) y=6 x B. ) y=(1/6)x C. ) y=4 x D. ) y=(1/4)x

9. The variables x and y vary directly. Given the equation y= -3 x, find the value of x when y= -18 A. ) x= -6 B. ) x= (-1/6) C. ) x= 6 D. ) x= (1/6)

10. The total cost of gasoline varies directly to how many gallons put into a car. If 3 gallons of gasoline cost $5. 25, how much do 5 gallons cost? What is the independent variable? A. ) Total cost of gasoline B. ) Cost per gallon C. ) Cost per 3 gallons D. ) Number of gallons put into car

11. The total cost of gasoline varies directly to how many gallons put into a car. If 3 gallons of gasoline cost $5. 25, how much do 5 gallons cost? Find k. A. ) k=15. 75 B. ) k=1. 50 C. ) k=1. 75 D. ) k=15. 50

12. The total cost of gasoline varies directly to how many gallons put into a car. If 3 gallons of gasoline cost $5. 25, how much do 5 gallons cost? A. ) $1. 50 B. ) $26. 25 C. ) $1. 75 D. ) $8. 75

13. The number of students served during school lunch varies directly as time. If 12 students can be served in 8 minutes, how many students can be served in 48 minutes? Define x and y. A. ) x=# students served, y=# of minutes B. ) x=# of cafeteria workers, y=# of minutes C. ) x=# students served, y= # of cafeteria workers D. ) x=# of minutes, y=# of students

14. The number of students served during school lunch varies directly as time. If 12 students can be served in 8 minutes, how many students can be served in 48 minutes? Find the constant (k) A. ) k=2/3 B. ) k=3/2 C. ) k=96 D. ) k=4

15. The number of students served during school lunch varies directly as time. If 12 students can be served in 8 minutes, how many students can be served in 48 minutes? A. ) 12 students B. ) 4 students C. ) 32 students D. ) 72 students

Answer Key • • 1. B 5. A 9. C 13. D 2. D 6. C 10. D 14. B 3. B 7. A 11. C 15. D 4. A 8. A 12. D