H O R I Z O N T AL VERTICAL © 2007 by S - Squared, Inc. All Rights Reserved.

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H O R I Z O N T AL VERTICAL © 2007 by S - Squared, Inc. All Rights Reserved.

The graph of a horizontal line is represented by the equation: y = b x y b Locate the b value on the y-axis. Draw a horizontal line through that point. SLOPE IS ZERO !

The graph of a vertical line is represented by the equation: x = a x y a Locate the a value on the x – axis. Draw a vertical line through that point. SLOPE IS UNDEFINED!

Graph: y = ─ 5 x y DONE!!! -5 Every point on the line has a y-value of − 5. WHAT IS THE SLOPE? ZERO

Graph: x = 4 x y WAY TOO EASY! 4 Every point on the line has a x-value of 4. WHAT IS THE SLOPE? UNDEFINED

x = −3 x y y = 2 Identify the point of intersection:

 Horizontal Line y = b - Find b on the y – axis - Draw a horizontal line through that point parallel to the x – axis  Vertical Line x = a - Find a on the x – axis - Draw a vertical line through that point parallel to the y – axis