Higher November 2018 Paper 6 Q9

OCRHigherCurrent spec2 marksDirect & Inverse Proportion

9 These graphs show different relationships between the variables \(x\) and \(y\).

Four sketch graphs: A is a straight line through the origin with positive gradient; B is a curve from the origin increasing ever more slowly; C is a curve decreasing from high on the left towards the x-axis without touching either axis; D is a straight line with negative gradient from the y-axis to the x-axis

Identify the graph which shows the following.

(a) \(y\) is directly proportional to \(x\). [1]
(b) \(y\) is inversely proportional to \(x\). [1]
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