SAT Question e97fd3f8: Two-variable Data Models And Scatterplots answer and explanation with Desmos solution

Choice D is correct. Each point $\left(x,y\right)$ on the scatterplot gives the width $x$, in centimeters, and the sale price $y$, in dollars, of one of the $10$ cutting boards put on sale at this store. According to the graph, $5$ cutting boards have widths that are between $18$ and $48$ centimeters. These widths, in centimeters, are $24$, $24$, $30$, $36$, and $42$. The sale prices, in dollars, corresponding to these widths are $10$, $15$, $20$, $30$, and $40$, respectively. The average of these sale prices, in dollars, is $\frac{10+15+20+30+40}{5}$, or $\frac{115}{5}$, which is equivalent to $23$. Therefore, cutting boards that have a width between $18$ and $48$ centimeters have an average sale price of $$23.00$.