Answer:
straight line
Step-by-step explanation:
Kinetic energy and the object's mass are directly proportional to each other. This means that as the mass of an object increases, the kinetic energy increases and as the mass of an object decreases, the kinetic energy decreases too.
For example, if you were to pitch a ball, it would take a greater kinetic energy to do it if the ball was heavier compared to a ball that weighs lightly because you need more energy in pitching it.
If you plot this on a graph, it will definitely give you a "straight line."