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Varies Directly...

Source: 1964 AHSME Problem 5

September 12, 2012
AMC

Problem Statement

If yy varies directly as xx, and if y=8y=8 when x=4x=4, the value of yy when x=−8x=-8 is:
<spanclass=′latex−bold′>(A)</span> −16<spanclass=′latex−bold′>(B)</span> −4<spanclass=′latex−bold′>(C)</span> −2<spanclass=′latex−bold′>(D)</span> 4k,k=±1,±2,…{{ <span class='latex-bold'>(A)</span>\ -16} \qquad<span class='latex-bold'>(B)</span>\ -4 \qquad<span class='latex-bold'>(C)</span>\ -2 \qquad<span class='latex-bold'>(D)</span>\ 4k, k= \pm1, \pm2, \dots} <spanclass=′latex−bold′>(E)</span> 16k,k=±1,±2,…{\qquad<span class='latex-bold'>(E)</span>\ 16k, k=\pm1,\pm2,\dots }
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