SAT Question b8cbe394: Linear Functions answer and explanation with Desmos solution

Choice C is correct. It's given that the cost of renting a tent is $$11$ per day for $d$ days. Multiplying the rental cost by the number of days yields $$11d$, which represents the cost of renting the tent for $d$ days before the insurance is added. Adding the onetime insurance fee of $$10$ to the rental cost of $$11d$ gives the total cost $c$, in dollars, which can be represented by the equation $c=11d+10$.