What I feel is, parabolas are not the part of as such syllabus. Probably, thegraph might have been used for question based on some other topic.
Please check it again. As far as I think, it might be a question of Quadratic equation. If you draw any graph for quadratic equation, it comes out to be a parabola. But, basics tested are quadratic.
So, pls check.
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Source: Beat The GMAT — Quantitative Reasoning |