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直线方程题卡笑文题过点Ｐ（－１，２）作一直线，在两坐标轴上截得的线段等长，则这样的直线有（Ａ）１条（Ｂ）２条（Ｃ）３条（Ｄ）４条分析只要确定待定直线的斜率，就可以写出所求直线所属的直线系的方程．主解设直线的斜率为ｋ，则有直线系方程ｙ＝ｋ（ｘ＋１）＋２...
The line equation question card titled Xiaowen’s question crosses P(-1,2) as a straight line, and the line segments intercepted on the two coordinate axes are of equal length. Such lines are (A) 1 (B) 2 (C) 3 (D) 4 bars of the analysis can determine the equation of the linear system to which the straight line belongs, as long as the slope of the line to be determined is determined. The slope of the main solution is set to k, then there is a linear equation y=k(x+1)+2...