A potential food additive was given to rats (approximately 1 lb
weight) to test its efficacy. Dosages were increased until effects
were noted, including fatalities. The data follows:

What are the ED₅₀ and LD₅₀ (Hint
plot the data)

What is your recommendation as to the limit placed on human
(assume 150 lb weight) exposure? Explain your reasoning. Note: This
is ingestion so use weight vs. lung volume as the scaling
factor