Methyl mercury is a toxic substance that can harm the nervous system. Some fish are contaminated with high levels of methyl mercury. In many places, these fish are an important food source. Experiments are being conducted to determine how many meals of contaminated fish can be safely consumed. The table below shows the concentration of methyl mercury in the fish and the number of meals that can be safely consumed per month.

*conectration of methyl mercury in fish (ppm)

*number of meals safely consumed per month

which is the dependent and independent

is number of meals the independent (x axis)

and concentration.. the dependent or the y-axis