1. Direct Variation iRespond

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

3. 2. Which table represents a direct variation? A.) Table 1 B.) Table 2 C.) Table 3 D.) Table 4 Table4 xy 24 36 612 Table1 xy 24 36 618 Table3 xy 26 62 612 Table2 xy 28 312 618

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

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

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

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

8. 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

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

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

11. 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

12. 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

13. 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

14. 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

15. 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

16. 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