SAT Question 7cd1c6db: Ratios Rates Proportional Relationships And Units answer and explanation with Desmos solution

Choice A is correct. If the object travels $108$ centimeters at a speed of $12$ centimeters per second, the time of travel can be determined by dividing the total distance by the speed. This results in $\frac{108\text{centimeters}}{12\text{centimeters}/\text{second}}$, which is $9$ seconds.