Assume you have collected data pairs (x, y) on a certain variety of tree. xis
the number of weeks since the tree was planted and yis the height of the tree
in inches. A plot of the data points with the best-fit line is given below. What
is the numerical value of the height as predicted by the best-fit line for an age
of 40 weeks?
th
Height
20
40
60
80
100 120
Age