The equation shown in the image is the simple interest formula:

$I = prt$

Where:

• $I$ is the interest earned,
• $p$ is the principal amount (initial investment),
• $r$ is the annual interest rate (as a decimal),
• $t$ is the time the money is invested or borrowed for, usually in years.

This formula calculates the interest generated from an investment or loan over time, assuming the interest rate remains constant and the interest is not compounded.

Would you like a more detailed explanation or example on how to apply this formula?

Here are five related questions you might want to explore:

1. How do you solve for the principal ($p$) if you know $I$, $r$, and $t$?
2. What happens if the interest is compounded, and how would the formula change?
3. How do you convert interest rates from percentages to decimals?
4. What is the difference between simple interest and compound interest?
5. How does changing the time period ($t$) affect the total interest earned?

Tip: Always ensure the interest rate ($r$) is in decimal form before applying it in the formula (e.g., 5% becomes 0.05).