SAT Question e9ef0e6b: Linear Inequalities answer and explanation with Desmos solution

Choice B is correct. It's given that the model estimates that whales from the genus Eschrichtius travel $72$ to $77$ miles in the ocean each day during their migration. If one of these whales travels $72$ miles each day for $16$ days, then the whale travels $72\left(16\right)$ miles total. If one of these whales travels $77$ miles each day for $16$ days, then the whale travels $77\left(16\right)$ miles total. Therefore, the model estimates that in $16$ days of its migration, a whale from the genus Eschrichtius could travel at least $72\left(16\right)$ and at most $77\left(16\right)$ miles total. Thus, the inequality $\left(72\right)\left(16\right)\le x\le \left(77\right)\left(16\right)$ represents the estimated total number of miles, $x$, a whale from the genus Eschrichtius could travel in $16$ days of its migration.