a player kicks a 0.40 kg soccer ball thats sitting at rest with an average force of 100 N, and her foot is in contact with the ball for 0.15 seconds. what is the change in momentum of the ball.

Alinear relationship would look like a straight line on the graph. it could have a positive negative or 0 slope. so it could be a line potentially going in any direction but it must be perfectly straight.