Equations of Vertical and Horizontal Lines

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Assignment: Equations of Vertical and Horizontal Lines

Write equations for the horizontal and vertical lines described in the real-world situations below.

1. In many cities and towns across the United States, the numbering system of the

roads is based on a grid, similar to the latitude and longitude lines on a globe.

Suppose the green lines in the following graph represent two east-west and two

north-south running roads in a Midwestern town.

Write equations for the two horizontal and two vertical lines that represent 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. Measuring 1,450 feet, the tower contains 110

stories filled with a combination of office and retail space. The base of the tower is

made up of nine 75’ × 75’ squares. Suppose the square graphed on the coordinate

plane below represents the base of the Willis Tower.

-10 -5 5 10

-10

-5

5

10

x

y

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

3. Think of another real-world situation that might involve horizontal and vertical lines.

Write a description of the situation and draw the graph of a coordinate plane with two

horizontal and two vertical lines to represent your situation. Draw the lines so that two

of them pass through positive values and the other two pass through negative values

on the coordinate plane. Then write equations for all four of the lines on your graph.