Final answer:
False. The slope of the curve does not directly verify the velocity of the jet car at t = 20 s.
Step-by-step explanation:
True or False: By taking the slope of the curve in the graph you can verify that the velocity of the jet car is 115 m/s at t = 20 s.
False. In order to verify the velocity of the jet car at t = 20 s, you should find the slope of the tangent line to the curve at t = 20 s. The slope of the tangent line represents the instantaneous velocity at that specific point on the graph.
By taking the slope of the curve, you can calculate the velocity at different points, but it does not directly give the velocity at t = 20 s unless it corresponds to the tangent line of the curve at that specific point.