What graph shows the relationship between kinetic energy and mass

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

Me ! since green bounces off red, this must be collision a.elastic b.explosion c.inelastic