SAT Question 43744269: Two-variable Data Models And Scatterplots answer and explanation with Desmos solution

Choice B is correct. It′s given that the airplane descends at a constant rate of $400$ feet per minute . Since the altitude decreases by a constant amount during each fixed time period, the relationship between the airplane′s altitude and time is linear. Since the airplane descends from an altitude of $9,500$ feet to $5,000$ feet , the airplane′s altitude is decreasing with time. Thus, the relationship is best modeled by a decreasing linear function.