[問題]GWD 03-19

[FannyHsieh]

The graph of which of the following equations is a straight line that is parallel to line l in the figure above?
(所給的圖是XY座標圖上line l 通過(0, 2)與 (-3, 0))

(A) 3y-2x = 0
(B) 3y+2x = 0
(C) 3y+2x = 6
(D) 2y-3x = 6
(E) 2y+3x = -6

Ans. (A)

這題其實很簡單，line l的直線方程式我也算出來了，沒錯的話是3y-2x=6
不過我熊熊忘記要怎麼樣去快速判別哪條直線與所設定之直線是否平行^^;

從答案來看是3y-2x=○的直線方程式就是跟line l平行？
我只記得斜率一樣的概念@_@
還請高人提醒一下這個國中數學的平行線判別技巧，謝謝o(_ _)o