A tree's height, in feet, is proportional to the number of years it has been growing. The graph shows this relationship.

What is the unit rate for feet per year?

I'll take your word for it when you say that the graph shows this relationship.

I can't agree or disagree, since you haven't shared the graph. Sadly, it's also

impossible to determine the unit rate in feet of growth per year without seeing

the graph.

Look at the graph add each year as it grows and divide it by the total