請詳細步驟教我計下條 :
(不要綱址回答)
圖片參考：http://imgcld.yimg.com/8/n/HA00997022/o/701210160061813873367840.jpg
急! F5 Graphs of Functions 3q7
2012-10-17 7:57 am
回答 (1)
2012-10-17 3:27 pm
✔ 最佳答案
Equation of line :(y - 4)/(0 - 4) = (x - 0)/(- 8 - 0)
(y - 4)/(-4) = x/(-8)
y - 4 = x/2
y = x/2 + 4.
For reflection in the y - axis, replace x by - x, that is
y = (-x)/2 + 4 = - x/2 + 4
For reduction along the x - axis, multiply x by (1/k). Now k = 1/2, so multiply x by 2.
So y = (- 2x)/2 + 4 = - x + 4.
收錄日期: 2021-04-13 19:03:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20121016000051KK00618