5 years because when you divide 90 by 18 to get how many years it takes the tree to grow to 90 inches tall, you get 5.
Answer:
Option 1 and 2
Step-by-step explanation:
Slope = 2
y-intercept = 5
6x+10-3x=55
6x-3x=10+55
3x=65
65÷3=21.6
