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4. Suppose y varies inversely with the x, and y = -1 when = 3. What inverse variation equation relates x and y?

a. y = 3/x
b. b. y = -3x
c. y = 3x
d. y = -3/x

5. Suppose y varies inversely with x and y = 68 when x = 1/17. What is the value of x when y = 16?

a. 64
b. 32
c. 1/4
d. 1/16

6. Suppose y varies inversely with x, and y = 5 when x = 15. What is the value of y when x = 25
a. 3
b. 5
c. 25
d. 15