3.4b Notes - a 3x 7y = 4 and 6x 14y = 7 b 2x 5y = 1 and-5x...

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3.4b The Slope of a Line Parallel Lines Two lines are  parallel  if they have the  same  slope and different y-intercepts. Perpendicular Lines Two lines are  perpendicular  if the  product of their slopes is -1 . (This means that the slope of one is the  negative reciprocal  of the slope of the  other.) Example: Are the following pairs of lines parallel, perpendicular, or neither?
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Unformatted text preview: a) 3x + 7y = 4 and 6x + 14y = 7 b) 2x + 5y = 1 and-5x + 2y = 4 Applications (Word Problems) Suppose your salary increases by $1200/year and that you currently earn $39,400. Use an equation to predict your salary in 5 years. Homework: 10/13/10 Ch.3 #6 p. 177 #37-87 odd...
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