The point that represents the mass of each one when they born is the point of intersection between the line and the y-axis, which means the point whose x-coordinate = 0
The Mochi's weight when he is born is 1 point (0, 1)
The Kappa's weight when is born is 2, the line intersect the y-axis at point (0, 2)
Then Kappa is heavier when they were born