lesson18outline

# lesson18outline - MA 153 Lesson 18 Outline Answering of...

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MA 153 Lesson 18 Outline Answering of homework questions over lesson 17. Lesson 18 Section 3.3 Lines Example: () ( 2,3 and 1, 2 AB −− ) x y Slope ( m ) 21 rise run yy m x x == Example: E x a m p l e : y =− 2 x = 3 x y x y

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Equations of lines (1) Point-slope form () 11 yy m xx −= m = slope point is , x y (2) Slope-intercept form ym xb =+ m =slope b represents the y -intercept ( ) 0, b General form: ax by c += a, b, and c are integers (no fractions) a ” is positive Example: Find a general form of the line given: (a) through the point ; 5, 3 A 4 m = − Method 1 Method 2
Theorem: (1) Slopes of parallel lines are equal (2) Slopes of perpendicular lines are negative reciprocals

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lesson18outline - MA 153 Lesson 18 Outline Answering of...

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