1.2 Inverse Variation
If a quantity y varies inversely as another quantity x, then
(a) y increases when x decreases,
(b) y decreases when x increases
1.2b Expressing an inverse variation in the form of an equation
An inverse variation can be written in the form of an equation, where k is a constant which can be determined.
Given y varies inversely as x and y = 4 when x =10. Write an equation which relates x and y.
Example 2:Given that y = 3 when x = 6, find the equation relates x and y if: