3
The period is the amount it time it takes to make one complete cycle. If we start at 0 for simplicity sake, the graph is at its maximum point. It reaches its maximum point again at 3, this is one complete cycle and thus the period is 3.
The third option: uses visual representation of the logical...
1813 x

= 326.34
18% of 1813 people is 326.34 people
333 is a reasonable estimate.
I think your answer is gonna be 20

Step-by-step explanation:
