d. If Rocky’s total expenses increased by ≥ 30% from 1998 to 2002, then his expenses on bike would’ve also

increased from 1998 to 2002 (the only confusion can rise in the years where the percentage is drpping from 25% to 20%)

take the total expense in 1999=100 and the expense in 2000 =130. Then , the expense on bike is 25 and 26 respectively. Thus, there is a definite increase

1. The percentage increase in expenses over the previous year on bus is highest in 2000, but the

percentage increase in expenses on Bike could’ve been highest in 1999, 2001 and 2002

2. The total expense is highest in 1999. But as the expense on bus as a percentage of total cost also

increases, we can’t be sure if the expense on bus has increased from 1999 to 2000

3. The total expense on bike and car has decreased, but then, the expense on bus can increase or

decrease.

4. The total expenses increased from 1998 to 2002, and expense on bike increased also kept increasing

continuously, this statement is definitely true.