# Graphing Calculator Drawing: Horizontal and Vertical Lines

*Horizontal and vertical lines can be used to draw a castle.*

*This post is a chapter in the book Graphing Calculator Drawing Exercises.* *Suggested citation:* Skycak, J. (2019). Graphing Calculator Drawing: Horizontal and Vertical Lines. *Graphing Calculator Drawing Exercises.* https://justinmath.com/graphing-calculator-drawing-horizontal-and-vertical-lines/

** Setup.** Navigate to https://www.desmos.com/calculator. Be sure to sign in so that you can save your graph.

** Demonstration - Vertical Lines.** Observe the graph as you type each of the following inputs:

** Demonstration - Horizontal Lines.** Observe the graph as you type each of the following inputs:

** Demonstration - Rays and Segments.** Observe the graph as you type each of the following inputs:

** Exercise.** Reproduce the graph below. (Note: you can change the line color by clicking

__and holding__the colored circle to the left of the math input box.)

** Exercise.** Add ridges to the top of the graph you produced in the previous example.

** Challenge.** Draw a full castle!

*This post is a chapter in the book Graphing Calculator Drawing Exercises.* *Suggested citation:* Skycak, J. (2019). Graphing Calculator Drawing: Horizontal and Vertical Lines. *Graphing Calculator Drawing Exercises.* https://justinmath.com/graphing-calculator-drawing-horizontal-and-vertical-lines/