-5y <= -15

My answer is y>=3

Right.

Thank you very much. We have been working with these and we learned that addition and subtraction the signs stay the same and change on multiplication and division

You're welcome.

To solve the inequality -5y ≤ -15, you need to isolate the variable y. Here's how:

Step 1: Start with the given inequality: -5y ≤ -15.
Step 2: Divide both sides of the inequality by -5. Remember, when dividing or multiplying an inequality by a negative number, flip the inequality sign.
-5y / -5 ≥ -15 / -5
This gives you y ≥ 3.

Therefore, your answer y ≥ 3 is correct.