3/y =6/y-2i need on this worth 15 points

The graph shows the rate at which paint is used to paint a wall. enter values to complete each statement below based on the graph. when 1 gallon of paint has been used, ( # ) square feet of the wall will be painted. the unit rate is ( # )square feet per gallon.

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

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?