来自 Theory and problems for senior high math
Translation of graphs圖形的轉換
The graph of the function y=f(x) consists of all points (x,y) whose co-ordinates satisfy the equation.
y=f(x) 這個函數圖像組合了所有滿足這個等式的點(x,y)。
a) Vertical shifts, a>0垂直平移
For the graph of y=f(x), the graph of :對於函數圖像y=f(x)來說,以下圖像:
y=f(x)+a is shifted up 'a' units
y=f(x)+a向上平移a個單位
y=f(x)-a is shifted down 'a' units
y=f(x)+a向下平移a個單位
Examples:例子
QUADRATIC GRAPHS: 二次函數
y=x2
y=x2+1
y=x2-2
SQUARE ROOT GRAPHS:平方根函數
y=√x
y=√x -2
y=√x+1
ABSOLUTE VALUE GRAPHS:絕對值函數
y=|x|
y=|x| +1
y=|x|-2
CUBIC GRAPHS:三次方函數
y=x3
y=x3+1
y=x3-2
RECIPROCAL GRAPHS:倒數函數
y=1/x
y=1/x +1
y=1/x -2
Translate by Annabelle Wu
翻譯自 Annabelle Wu