Forensic scientists can deduce the amount of arsenic in drinking water from concentrations (in parts per million) in toenails. Let y denote toenail concentration and x denote drinking water concentration. The following three equations describe the relationship: y = 1.5 + 0.2 ln (x) ln (y) = -1.75 + 20x
(a) Plot each of the functions for x = 0 to x = 15.
(b) Calculate the slope of each function at x = 10. State the interpretation of the slope.
(c) Calculate the elasticity of each function at x = 10 and then interpret the given value.