Index Number and Reference Value

Identify index numbers from a reference value.

The following are the Consumer Price Index (CPI) for the years 1991-1993. All of the values use a reference year of 1986.

YearCPI199111019921201993135

Whichof the following is true about the CPI, based on the information?

• a.)$100 in 1991 would have been worth $110 in 1986.
• b.)$100 in 1993 would be equivalent to $120 in 1992.
• c.)$100 in 1986 would be equivalent to $135 in 1993.
• d.)$100 in 1992 would have been worth $100 in 1986.