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在直线方程中，截距的定义为：如果直线和x轴的交点为（a，0）,则a叫做直线在x轴上的截距，简称横截距．如果直线和y轴的交点为（0，b），则b叫做直线在y轴上的截距，简称纵截距．当直线经过原点时，即a＝b＝0时，横截距和纵截距相等，都是0．某数学书中有这样一道题：求过点P?
In the equation of the straight line, the intercept is defined as: If the intersection of the straight line and the x-axis is (a, 0), then a is called the intercept of the straight line on the x-axis, referred to as the cross-section. If the intersection of the straight line and the y-axis is (0,b), then b is called the intercept of the line on the y-axis, or short intercept. When the straight line passes through the origin, ie, a=b=0, the cross-section and the vertical intercept are equal and both are 0. There is a question in a math book: ask P?