SAT Question 80da233d: Linear Inequalities answer and explanation with Desmos solution

Choice D is correct. It's given that the elephant weighs $200$ pounds at birth and gains more than $2$ pounds but less than $3$ pounds per day during its first year. The inequality $200+2d<w<200+3d$ represents all possible weights $w$, in pounds, for the elephant $d$ days after birth. Substituting $365$ for $d$ gives $200+2(365)<w<200+3(365)$, which is equivalent to $200+730<w<200+1,095$, or $930<w<1,295$. Therefore, the inequality $930<w<1,295$ represents all possible weights, in pounds, for the elephant $365$ days after birth.