Suppose a vine maple grows in height linearly. Four weeks after it is planted it stands 9.33 inches, and after seven weeks it is 13.33 inches tall. An equation that models the growth, in inches, of the vine maple as a function of time, in weeks.

1) What is the slope of the function?

2) How tall was the tree when it was first planted?

3) Write the function

4) How tall will the vine maple be after 16 weeks?

(If needed, round to 2 decimal places.)