The following line graph shows the growth of three different plants (P, Q, and R) over a period of 12 weeks. The vertical axis represents the height of the plants in centimeters, while the horizontal axis represents the time in weeks.
In the graph, Plant P exhibits steady growth, Plant Q shows rapid growth in the initial weeks followed by a plateau, and Plant R has erratic growth patterns.
Based on the graph, which statement accurately describes the growth trends of the plants?