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In many cities and towns across the United States, the numberingsystem of the roads is based on a grid, similar to the latitude andlongitude lines on a globe. Suppose the green lines in thefollowing graph represent two east-west and two north-south runningroads in a Midwestern town.

Write equations for the two horizontal and two vertical lines thatrepresent roads in the town.






2. The Willis Tower (formerly known as the Sears Tower) in Chicago,Illinois, is the tallest building in the United States. Measuring1,450 feet, the tower contains 110 stories filled with acombination of office and retail space. The base of the tower ismade up of nine 75’ × 75’ squares. Suppose the square graphed onthe coordinate plane below represents the base of the WillisTower.

Write equations for the two horizontal and two vertical lines thatpass through the square.



3. Think of another real-world situation that might involvehorizontal and vertical lines. Write a description of the situationand draw the graph of a coordinate plane with two horizontal andtwo vertical lines to represent your situation. Draw the lines sothat two of them pass through positive values and the other twopass through negative values on the coordinate plane. Then writeequations for all four of the lines on your graph.