Question

Which of these is a sign of inflation?

A negative number for the Consumer Price Index shows prices are falling.
A negative number for the Consumer Price Index shows prices are rising.
A positive number for the Consumer Price Index shows prices are falling.
A positive number for the Consumer Price Index shows prices are rising

Answer 1

A positive number for the Consumer Price Index shows prices are falling

Answer 2

If its inflation, usually things are rising in price, size, demand, etc.. As these things increase, there is something going down such as quantity and similar things. If you can makes sense of this then you're welcome.