Let x denote a person’s age and let y be the death rate, measured as the number of deaths per thousand individuals of a fixed age within a period of a year. For men in the United States, these variables follow approximately the equation  = 0.32(1.078)x.
a. Interpret 0.32 and 1.078 in this equation.
b. Find the predicted death rate when age is
(i) 20,
(ii) 50, and
(iii) 80.
c. In every how many years does the death rate double?