Since 1915, the infant mortality rate (in number of deaths per 1000 live births) could be approximated by the equation r(t) = 0.01t - 2t

Since 1915, the infant mortality rate (in number of deaths per 1000 live births) could be approximated by the equation r(t) = 0.01t² - 2t + 97, where t is the number of years since 1915.In what year does your model predict when the minimum number of deaths per 1000 live births would occur? Does this make sense?