SAT Question a396ed75: Linear Functions answer and explanation with Desmos solution

Choice D is correct. It′s given that Juan rides his bike at an average rate of $5.7$ minutes per mile. The number of minutes it will take Juan to ride $x$ miles can be determined by multiplying his average rate by the number of miles, $x$, which yields $5.7x$. Therefore, the function $m\left(x\right)=5.7x$ models the number of minutes it will take Juan to ride $x$ miles.