the graph of ch(x) is the graph of h(x) stretched vertically by a factor of c if c>1 the graph of ch(x) is the graph of

问题描述:

the graph of ch(x) is the graph of h(x) stretched vertically by a factor of c if c>1 the graph of ch(x) is the graph of h(x) shrunk vertically by a factor of c if 0

这里的系数c是乘以整个函数值h(x)的,所以是拉伸或收缩的关系
如果系数c是相加(或相减)整个函数值h(x),即h(x)+c或h(x)-c,那就是沿y轴上下平移.