Question

Six years after a tree was planted, its height was 7 feet. Nine years after it was planted, its height was 16 feet. Which of the following equations gives the height y, in feet, of the tree after x years if the tree grows at a constant rate? Check all of the boxes that apply:
1.y – 6 = 3(x – 10)
2.y – 16 = 3(x – 9)
3.y = 3x – 11
4.y = –3x – 23