To find the time \( t \) that Jordyn has been driving based on the distance \( d \) she has driven in miles, you would use the rule:
A. Divide by 50.
This is because if she is driving at a constant speed of 50 miles per hour, the relationship between distance, speed, and time can be expressed using the formula:
\[ t = \frac{d}{\text{speed}} \]
In this case:
\[ t = \frac{d}{50} \]
So, to find the time, you would divide the distance \( d \) by 50 (the speed in miles per hour).