How does simple interest show proportional reasoning? - Answers

Simple interest demonstrates proportional reasoning by establishing a direct relationship between the principal amount, the interest rate, and the time period. The formula for simple interest is ( I = P \times r \times t ), where ( I ) is the interest earned, ( P ) is the principal, ( r ) is the rate, and ( t ) is the time. This means that if any of these variables increase or decrease, the interest will change proportionally, illustrating how the components are interdependent and scale together. Thus, it exemplifies proportionality in financial calculations.