00:05 – 重溫基本的坐標幾何 | quick review on basics of coordinate geometry02:34 – 基本概念與點斜式 | the fundamental idea and point-slope form11:01 – 兩點式 | two-point form13:47 – 斜截式 | slope-intercept form15:32 – 截距式 | two-intercept form