Answer:
He was probably measuring himself without shoes on so with shoes it adds a inch to his Highth
Hope this helps in some way
The answer is 81/16 simply
To get the that relates x and y, we choose two points on the table and use the equation of a straight line as follows:
Recall that the equation of a staight line is obtained from the formula

Using the points (30, 18) and (36, 24), we have
42 because x is equal to its corresponding side