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Example19 - A and B is represented by Apply the cross...

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Example 4 Draw the graph of  y  = –1.  As shown in Figure 4,  y  = –1 is a horizontal line whose  y -coordinate is always –1.  Suppose that  A  is a particular point called (  x 1 y 1 ) and  B  is any point called (  x y ). Then the slope of  the line through 
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Unformatted text preview: A and B is represented by Apply the cross products property, and the equation becomes y – y 1 = m ( x – x 1 ) This is the point-slope form of a nonvertical line. Figure 4. y = –1 for all x values....
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