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?

The graph shows height, in feet, on the y-axis and time, in years, on the x-axis. The line goes through point (ten, seven).

http://static.k12.com/calms_media/media/1557000_1557500/1557383/1/05d22d810080e424948f3e5d6c18fb7a60e3e696/MS_IMB-1401029-190412.jpg

ft/year

Question

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?
 
   The graph shows height, in feet, on the y-axis and time, in years, on the x-axis. The line goes through point (ten, seven).   

http://static.k12.com/calms_media/media/1557000_1557500/1557383/1/05d22d810080e424948f3e5d6c18fb7a60e3e696/MS_IMB-1401029-190412.jpg

 
  ft/year