Noah is growing three different types of trees. He is keeping track of the height of each tree over time. This equation represents the height (in feet) of the Tree #1 over m months: h=3.5m
The information is in the table is for Tree #2:

time (months) height of tree (feet)
2 5
4 10
5 12.5
8 20
This graph shows how long, in months, it takes Tree #3 to grow h feet.

A graph. Height, in feet. Time, in months.

Which tree is growing the slowest?