Chris has a 10 foot long strip of red ribbon and a 15 foot long strip of blue ribbon.

A] draw a diagram to show the relationship of the length of the red ribbon to the length of the blue ribbon.
B] write a ratio to describe the relationship of the length of the red ribbon to the length of the blue ribbon

10:15 = 2:3

A] To draw a diagram showing the relationship between the length of the red ribbon and the length of the blue ribbon, you can use a rectangular shape to represent each ribbon. Draw a rectangle and label it as the red ribbon, then draw another rectangle and label it as the blue ribbon. The length of the red ribbon can be represented by the width of the rectangle, while the length of the blue ribbon can be represented by the height of the rectangle.

B] To write a ratio describing the relationship between the length of the red ribbon and the length of the blue ribbon, you can compare the lengths of the two ribbons. The ratio can be expressed as "red ribbon length : blue ribbon length" or "length of red ribbon/ length of blue ribbon".

In this case, the red ribbon is 10 feet long, and the blue ribbon is 15 feet long. Therefore, the ratio can be written as:

Red ribbon length : Blue ribbon length
10 : 15

This ratio can be simplified by dividing both numbers by their greatest common divisor, which in this case is 5. So, the simplified ratio would be:

2 : 3