What goes in the blanks. also want to know how on earth you solve this

Acollege is planning to construct a rectangular parking lot on land bordered on one side by a highway. the plan is to use 680 feet of fencing to fence off the other three sides. what dimensions should the lot have if the enclosed area is to be a maximum?

Determine the relationship of ab and cd given the following points

100 points, hi, i’m not sure how to get the equation from the graph and table.