SAT Question 93779b53: Distributions, Center & Spread answer and explanation with Desmos solution

Choice B is correct. The height of each bar in the bar graph given represents the number of students that voted for the activity specified at the bottom of the bar. The bar for activity $3$ has a height that is between $35$ and $40$. In other words, the number of students that chose activity $3$ is between $35$ students and $40$ students. Of the given choices, $39$ is the only value between $35$ and $40$. Therefore, $39$ students chose activity $3$.