The variables $x$ and $y$ are related by $y=\dfrac{k}{x}$. The graph passes through \(( 7,6.85

Question

The variables $x$ and $y$ are related by $y=\dfrac{k}{x}$. The graph passes through $( 7,6.857142857142857)$. Find the value of $k$. Find $y$ when $x=9$. State the effect on $y$ when $x$ is doubled.

Accepted Answer

(a) $k=48$; (b) $y=5.33$; (c) $y$ is halved.

Sec 3/4 E Math Mock 1-Q11 - Mock Paper 1: Applying inverse proportion to a graph

Sec 3/4 E Math Mock 1-Q11 - Mock Paper 1: Applying inverse proportion to a graph

Solution:

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