SAT Question 930c2990: Linear Functions answer and explanation with Desmos solution

Choice C is correct. For the graph shown, the x-axis represents temperature, in kelvins, and the y-axis represents volume, in liters. Therefore, the estimated volume, in liters, of the hydrogen when its temperature is $500$ kelvins is represented by the y-coordinate of the point on the graph that has an x-coordinate of $500$. The point on the graph with an x-coordinate of $500$ has a y-coordinate of $7$. Therefore, the estimated volume, in liters, of the hydrogen when its temperature is $500$ kelvins is $7$.