Question

1. What does "y is directly proportional to x" mean?

2. What does "y is inversely proportional to x" mean?

3. Suppose y is directly proportional to x and y=10 when x is 5. Find y when x is 7.

4. Suppose y is inversely proportional to x and y=10 when x is 5. Find y when x is 7.

5.Suppose y is inversely proportional to the square of x and y=10 when x is 5. Find y when x is 7

Please explain. Thank you!

Answer 1

There is an easy to follow discussion with worked examples here:

https://www.mathsisfun.com/algebra/directly-inversely-proportional.html

Read that before you begin to work on the problems. That will enhance your understanding.