SAT Question 620fe971: Linear Functions answer and explanation with Desmos solution

Choice A is correct. The $x$-intercept of the line with equation $y=120-25x$ can be found by substituting $0$ for $y$ and finding the value of $x$. When $y=0$, $x=4.8$, so the $x$-intercept is at $(4.8,0)$. Since $y$ represents the number of tons of cargo remaining to be moved $x$ hours after the team started working, it follows that the $x$-intercept refers to the team having no cargo remaining to be moved after $4.8$ hours. In other words, the team will have moved all of the cargo after about $4.8$ hours.