SAT Question 38525983: Two-variable Data Models And Scatterplots answer and explanation with Desmos solution

Choice A is correct. A line in the xy-plane that passes through the points $(x_1,y_1)$ and $(x_2,y_2)$ has a slope of $\frac{y_2-y_1}{x_2-x_1}$. The line of best fit shown passes through the points with approximate coordinates $(0,3.2)$ and $(2,4.4)$. It follows that the slope of the line of best fit is approximately $\frac{4.4-3.2}{2-0}$, which is equivalent to $\frac{1.2}{2}$, or $0.6$. Therefore, of the given choices, $0.6$ is closest to the slope of the line of best fit shown.