Effect of Light Intensity on Plant Growth Rate

Hard Data Representation Understanding Graphs And Tables

A researcher conducted an experiment to study the effect of varying light intensities on the growth rate of a specific plant species. Over a period of 10 weeks, the plants were exposed to four different light intensities: 100 lux, 300 lux, 600 lux, and 900 lux. The growth rate, measured in centimeters per week, was plotted on a graph which indicates the average height of the plants at the end of each week for each light intensity.

According to the data represented in the graph, which of the following statements accurately describes the relationship between light intensity and plant growth rate?

The growth rate increases linearly with increasing light intensity.

There is a threshold light intensity after which the growth rate declines.

The plants exposed to 300 lux showed the highest average growth rate.

Growth rates plateau at higher light intensities, indicating a saturation effect.

Hint

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