Question

The height of a sunflower plant varies directly with its age. Once it has sprouted from the ground, when a sunflower is 2 weeks old, it is 38 centimeters tall. When it is 6 weeks old, it is 114 centimeters tall. How tall is a sunflower plant that is 3 1/2 weeks old

Answer 1

1. Find the unit rate of the height of the sunflower to the age.

38/2= 19

2. Multiply the unit rate to the 3 1/2

19(3.5)= 66.5

In 3 1/2 weeks, the sunflower plant will be 66 1/2 centimeters tall.

Hope this helps!