Example:
x is directly proportional to y, if x=3 and y=2, find the constant of variation and then find x when y = 6?

Solution:
x ¥ y Þ x = ky
Given that x= 3, y = 2
3 =2k
\ k = 3/2
Þ
Constant of variation is 3/2
No, find x when y = 6.
y = 6 Þ x = (3/2) * 6
x = 3 * 3
x = 9

Directions: Solve the following problems. Also write at least 10 examples of your own.