Which scenario had the higher periodic rate of return: $1 grew to $2 or $3 grew to

Question:

Which scenario had the higher periodic rate of return: “$1 grew to $2” or “$3 grew to $5?” Both investments were for the same length of time at the same frequency. Justify your choice.
Compounding
Compounding is the process in which an asset's earnings, from either capital gains or interest, are reinvested to generate additional earnings over time. This growth, calculated using exponential functions, occurs because the investment will...