Name:___________________________
Date:______________ Block: ______
Tell whether the equation represents direct variation. If so, identify the constant of variation.
1. y = 8x
2. y = 2x + 1
3. 3x + y = 6
Find the constant of variation in these direct variations.
4. y = 11x
5.
y
 13
x
6. 4 x  4y  0
Graph the direct variation equation.
7. y = 9x
8. y = –7x
Find the constant of variation and write the equation for direct variation show in the tables below.
9.
10.
x
2
4
8
10
Y
1
2
4
5
x
4
16
40
120
Y
1
4
10
30
11. The number of words Maria typed varies directly with the amount of time she spent typing. If she
typed 275 words in 5 minutes, how long would it take her to type 1,100 words?
12. Trina’s paycheck earnings, p, varies directly as the number of hours, h, she works. If she works 19
hours and earns $187.15, what should she earn if she worked 40 hours?
13. The number of water bottles used during a team’s football practice varies directly with the
temperature. If a team uses 75 bottles when the temperature is 60 , what is the temperature if they
use 120 bottles?