.9. The following situations are examples of a direct variation except. a

A. The area of a triangle is proportional to its height
. B. The distance travelled by car to its speed.
C. The cost per person of renting a van to the number of persons sharing therent

D. The cost of electricity to the number of kilowatt-hour consumption

10. The area A of a triangle to its base b and height h. The equation of the variation is A = kbh. What kind of variation is it?
A. Direct
B. inverse
C. joint
D. combined

11 The weight w of an object is directly proportional to its mass m is written as ___
A. W = km
B.w=k/m
C. m =k/w
D. m = kw

12. If x and y vary inversely, what happens to the value of x as y increases?

A. Increases
C. decreases
B. stays the same
D. neither increases nor decreases

13. It is the value of a quantity that changes under different situations, or

A. constant
B. variable
C. variation
D. solution

14. If a varies directly as b and a = 12 when b = 4, find a when b = 12.
A 3
B. 4
C. 36
D. 48
15. If y varies inversely as x and y = 48 when x = 10, find y when x= 32
a.10
b.15
c.20
d.25​​