a) Convergent sequences are half of a rainbow, because when plotted and connected, they make a shape of 1/4 of a circle. Meanwhile, divergent sequences are spikes when the dots are connected. It has its spiky shape to say that the divergent sequences never grow nor decrease as n grows bigger.

b) Convergent series is half of a curved ramp. When it converges, it has its shape of half of a curved ramp when you connect the dots on a convergent series plot. On the other hand, divergent series is a type of series that it can’t be described as a shape. It is chaos.