SAT Question 7b1a3200: Distributions, Center & Spread answer and explanation with Desmos solution

Choice B is correct. The dot plot gives the diameter, to the nearest inch, of each sea star in a group of tide pools. The number of dots above a given diameter represents the number of sea stars with that diameter, to the nearest inch. There are $6$ dots above $16$ inches. Therefore, $6$ sea stars had a diameter, to the nearest inch, of $16$ inches.