State an equation that matches the description in exercise 22.

We want maximum 4 and minimum -4

Sin x has period of 2 pi but we want period just pi.

So y =4sin(2x)

The 2x will make the period equal to pi where as just x by itself makes the period 2 pi.

http://m.wolframalpha.com/input/?i=y%3D+4sin%282x%29&x=0&y=0

We want maximum 4 and minimum -4

Sin x has period of 2 pi but we want period just pi.

So y =4sin(2x)

The 2x will make the period equal to pi where as just x by itself makes the period 2 pi.

http://m.wolframalpha.com/input/?i=y%3D+4sin%282x%29&x=0&y=0

Ithink the correct answer is d.