Question

Rewrite f(x)=sin(x) if the function is stretched vertically by a factor of 2.A) sin(2x)B) 1/2sin(x)C) sin(x/2)D) 2sin(x)

Answer 1

If the function f(x) is stretched vertically by a factor of k, then it will change to k[f(x)]

Since the given function is

$f(x)=sin(x)$

Since f(x) is stretched vertically by a factor of 2, then

k = 2

Then the function will be

$f(x)=2sin(x)$

The answer is D