- Click on
**Constant Sum**. You can change the sum by moving point S. What can you say about the intercepts? - You can move the point on the line by moving its x-coordinate on the x-axis.
- Click on
**rectangle**. As you move the point, what can you say about the rectangle's perimeter? - Click the reset button at the top right. Click on
**Constant Product**. You can change the product by moving point P. - You can move the point on the curve by moving its x-coordinate on the x-axis.
- Click on
**rectangle**. As you move the point, what can you say about the rectangle's area? - Click the reset button at the top right. Show both graphs. What do you think the coordinates of the intersection points will be? Why?
- Click on
**Intersection**to confirm your guess.