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AHSME 1950- part 2

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July 18, 2008
calculusderivativequadraticsalgebrasystem of equationsarithmetic series

Problem Statement

The formula which expresses the relationship between xx and yy as shown in the accompanying table is: \begin{tabular}[t]{|c|c|c|c|c|c|}\hline x&0&1&2&3&4\\\hline y&100&90&70&40&0\\\hline \end{tabular} <spanclass=′latex−bold′>(A)</span> y=100−10x<spanclass=′latex−bold′>(B)</span> y=100−5x2<spanclass=′latex−bold′>(C)</span> y=100−5x−5x2<spanclass=′latex−bold′>(D)</span> y=20−x−x2<spanclass=′latex−bold′>(E)</span> None of these<span class='latex-bold'>(A)</span>\ y=100-10x \qquad <span class='latex-bold'>(B)</span>\ y=100-5x^2 \qquad <span class='latex-bold'>(C)</span>\ y=100-5x-5x^2 \qquad\\ <span class='latex-bold'>(D)</span>\ y=20-x-x^2 \qquad <span class='latex-bold'>(E)</span>\ \text{None of these}
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