determine the period.\n(15, -5)\n(33, -5)

Explanation:

Step1: Identify key points

We have two corresponding points on the wave: $(15, - 5)$ and $(33,-5)$.

Step2: Calculate the period

The period $T$ is the horizontal distance between two corresponding points on a periodic - function. So $T=33 - 15$. $T = 18$

Answer:

$18$