试题与答案

小明到眼镜店调查了近视眼镜的度数和镜片焦距的关系如下表:眼镜片度数y(度)400

题型:解答题

题目:

小明到眼镜店调查了近视眼镜的度数和镜片焦距的关系如下表:
眼镜片度数y(度)40062580010001250
镜片焦距x(cm)251612.5108
(1)根据上表体现出来的规律,请写出眼镜度数y(度)与镜片焦距x(cm)之间的函数关系式;
(2)若小明所戴眼镜度数为500度,求该镜片的焦距.

答案:

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参考答案:E

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