Final answer:
To find the constant of proportionality, divide the change in distance jogged by the change in number of days.
Step-by-step explanation:
To determine the constant of proportionality, we can use the formula:
constant of proportionality = change in output / change in input
In this case, the output is the distance jogged and the input is the number of days. So, we can calculate the constant of proportionality by dividing the change in distance by the change in days:
constant of proportionality = (2 miles - 3.5 miles) / (2nd day - 1st day)