SAT Question 0ea7ef01: Linear Functions answer and explanation with Desmos solution

Choice C is correct. For the graph shown, the x-axis represents pressure, in atmospheres, and the y-axis represents temperature, in kelvins. Therefore, the estimated temperature, in kelvins, of the oxygen gas when its pressure is $6$ atmospheres is represented by the y-coordinate of the point on the graph that has an x-coordinate of $6$. The point on the graph with an x-coordinate of $6$ has a y-coordinate of approximately $700$. Therefore, the estimated temperature, in kelvins, of the oxygen gas when its pressure is $6$ atmospheres is $700$.