Answer: 20cm
Step-by-step explanation:
Based on the table, we have the heights of plants after 0, 6, 12 weeks. Since one week is between 0 and 6, we know that the centimeters will be between 17 and 35.
If we take a look at the centimeters, we can see that every 6 weeks, the plants grow by 18cm. Since plants grow 18cm in 6 weeks, we get 18÷6=3cm.
This means we know the plant grows 3cm per week.
17+3=20cm
