好像截距不能为负,就像两点之间的距离只能是正数一样。 在y轴上截距为5的点可以是(0,5)和(0,-5) Microsoft Student 2006 查到的信息如下:
2. | mathematics distance from origin to axis crossing: the distance from the origin of a coordinate system to the point where a curve or surface crosses an axis |
不知道为什么网上查到的教案还特别强调截距不是距离? OG上说,intercept是坐标,那就是可以为负。 The y-intercept is the y-coordinate of the point at which the graph intersects the y-axis(OG Math Review)
[此贴子已经被作者于2007-9-3 18:50:17编辑过] |