Variation describes how one quantity changes when another changes. You will learn direct variation, inverse variation, joint variation, and partial variation for O-Level. We use y = kx for direct, y = k/x for inverse.
Definitiony varies directly as x means y = kx, where k is the constant of variation.As x increases, y increases …
View LessonDefinitiony varies inversely as x means y = k/x, where k is the constant.As x increases, y decreases so that …
View LessonDefinitiony varies jointly as x and z means y = kxz.You can mix direct and inverse: y ∝ x/z means …
View LessonDefinitiony is partly constant and partly varies with x. So y = kx + c.We need two pairs of values …
View LessonSolve:y ∝ x. When x = 5, y = 20. Find y when x = 8.p ∝ q2. When q …
View Exercise Submit ExerciseSolve:y ∝ 1/x. When x = 4, y = 5. Find y when x = 10.t ∝ 1/v2. When v …
View Exercise Submit ExerciseSolve:y varies jointly as x and z. When x = 2, z = 5, y = 30. Find y when …
View Exercise Submit ExerciseSolve:C is partly constant and partly varies as d. When d = 2, C = 10. When d = 5, …
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