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.
y - 6 = 3(x - 10)
y - 16 = 3(x-9)
y = 3x - 11
y=-3x - 23
DO NE