Assume you have collected data pairs (x, y) on a certain variety of tree. x is the number of weeks since the tree was planted and y is the height of the tree in inches. A plot of the data points with the best-fit line is given below. What age is predicted by the best-fit line for a height of 70 inches? 

Assume you have collected data pairs x y on a certain variety of tree x is the number of weeks since the tree was planted and y is the height of the tree in inc class=