Linear equations in two variables · 第 21 题

Linear equations in two variables · 原库模块 1 · Q21 原库参考解析

In the xy-plane, line k is defined by x + y =0. Line j is perpendicular to line k, and the y-intercept of line j is (0,3). Which of the following is an equation of line j ?

Linear equations in two variables · 第 21 题

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