SAT Question b3547a10: Two-variable Data Models And Scatterplots answer and explanation with Desmos solution

Choice C is correct. It’s given that the scatterplot shows the relationship between the number of seeds planted, $x$, and the number of seeds that germinated, $y$. The slope of a line of best fit represents the change in the y-value for a given change in the x-value. According to the graph, the y-value of the line of best fit increases by about $60$ when the x-value increases by about $100$, which represents an increase of about $60$ germinated seeds for every additional $100$ seeds planted. Therefore, the best interpretation of the slope of the line of best fit is that the number of seeds that germinate is predicted to increase by $60$ seeds for every additional $100$ seeds that are planted.