A tree that grows 3 feet every 5 years is growing at a rate of ___ feet per year.

To find the rate at which the tree is growing in feet per year, we need to divide the growth in feet by the number of years it takes for that growth to occur.

The tree grows 3 feet every 5 years. Therefore, the rate of growth is 3 feet divided by 5 years, or 0.6 feet per year.