Question

when you first move into your current house, you noticed that a tree outside had a height of 63 inches. You noticed that after 3 years, the height was 72 inches. Predict how tall the tree will be after 20 years.

Answer 1

72-62=9 (grow 9 inches in 3years)
In a year it grows 3 inches (9/3)
Find how much it grows in 20 years:
3*20=60 inches
Then just add the 60 inches to the original height er
63+60=123 inches