SAT Question 29fa7970: Distributions, Center & Spread answer and explanation with Desmos solution

Choice D is correct. It's given that the bar graph summarizes the charge, in kilowatt-hours $\left(\text{kWh}\right)$, a battery received each day for $15$ days. The height of each bar in the bar graph shown represents the number of days the battery received the charge, in $\text{kWh}$, specified at the bottom of the bar. The bar for a charge of $0$ kWh reaches a height of $6$. Therefore, the battery received a charge of $0$ kWh for $6$ of these days.