二元一次不等式 | Linear Inequalities in Two Unknowns

影片內容：

00:31 – 二元一次不等式的圖像 | graphical representations of linear inequalities in two unknowns
09:15 – 聯立二元一次不等式 (圖解法) | solving system of linear inequalities by graphical method
11:17 – 例子 1 | example 1
13:18 – 例子 2 | example 2