Problem: Measurements #1

x_1, y₁ and x_2, y₂ are two sets of values that are related according to the following equation:

The points (x_1, y₁) and (x_2, y₂) lie on the graph

A.		C.
B.		D.

Solution

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The answer is C.

The above equation can be rearranged in this way:



When xy = k, that means y is inversely proportional to x. The graph y versus x will be like the one in C.

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Question source: Malaysia National Physics Competition Panel