考生如果觉得复习gre数学考试比较难不妨从这些题目练习开始，每篇都是按照分类给大家列举了一些典型题目，本篇主要是针对gre数学考试数据解释题型方面的典型题目及答案。每天2道题，希望对大家的复习有所帮助。

　　1.This question refers to the graph above. In the question all references to gasoline prices and taxes refer to average prices, including tax, and average taxes, in United States dollars. On June 1,1989.

　　If the tax per gallon of gasoline in Canada were doubled and the increase in tax added to the price per gallon of gasoline, what percent of the resulting price per gallon percent of the resulting price per gallon would the tax then be?