To find out how much jam Vincent jarred in 4 days using unit rates, we first determine the unit rate of jam produced per day.
Vincent jarred 14 liters in 2 days, so we can find the rate by dividing the total liters by the total number of days:
Now that we have the rate, we can calculate how much jam he would jar in 4 days.
Therefore, Vincent jarred 28 liters of jam in 4 days.