Calculating Simple Interest

The video tutorial explains how to calculate simple interest using the simple interest equation. It begins with an example of Tim investing $100 at a 3% annual simple interest rate. The tutorial covers the concept of percent change, conversion between percent and decimal, and the calculation of simple interest. It also discusses the impact of varying the principal amount and time on the interest and final amount, illustrating these concepts with graphs. The lesson concludes with a summary of the simple interest calculation process.

What is the amount of interest Tim earns in a year if he deposits $100 at a 3% annual simple interest rate?

• $3

• $4

• $2

• $1

How do you convert a percentage to a decimal?

• Multiply by 100

• Divide by 10

• Move the decimal two places to the left

• Move the decimal two places to the right

Which of the following is the correct formula for calculating simple interest?

• Principal + Rate x Time

• Principal + Rate

• Principal x Rate

• Principal x Rate x Time

If Tim's principal amount increases, what happens to the interest earned?

• Interest becomes zero

• Interest increases

• Interest remains the same

• Interest decreases

What is the relationship between interest and principal in a simple interest scenario?

• They are equal

• They are directly proportional

• They are inversely proportional

• They are unrelated

What happens to the final amount if the time period for interest accumulation increases?

• Final amount decreases

• Final amount increases

• Final amount remains the same

• Final amount becomes zero

In a graph of interest over time, what does a straight line through the origin indicate?

• Interest is inversely proportional to time

• Interest is zero

• Interest is proportional to time

• Interest is constant