Answer:
Continuous
Number of months after the first year
Amount remaining on the card.
Explanations
After the first year, the value of the card will start to decrease at a constant rate of $2.50 per month. Since this is a continuous process, the relationship between the number of months after the first year and the amount remaining in the car is continuous.
On the other hand, we can say that the number of months after the first year is the independent variable because this is the variable that causes that the amount remaining on the card to decrease. Then, the dependent variable is the amount remaining on the card.
Therefore, the answers are:
Continuous
Number of months after the first year
Amount remaining on the card.
