A constant rate of increase (rmax) for a population produces a growth graph that is J-shaped rather than a straight line. Why?

Because the growth rate is constant, that is, the population is constantly growing and not stagnant.

Explanation:

The J-shaped growth graph occurs because the population is changing size (growing) as this population has a constant rate of increase. If the population was stagnant, it was neither increasing nor shrinking in a given size. time interval, the chart would have a line shape.

In other words, we can say that at a constant rate of increase, the population is growing steadily, causing a displacement of the line presented by the map that takes the form of J.