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Your Notes Homework Example 4 Find a perpendicular bisector Write an equation for the perpendicular bisector of the line segment joining A(24, 1) and B(2, 3). Solution 1. Find the midpoint of the line segment. 1 x1 1 x2 } 2 , y1 1 y2 24 1 2 1 1 3 } 2 2 5 1 } , } 2 2 2 5 ( 21 , 2 ) 2. Calculate the slope of } AB . m 5 y 2 2 y 1 } x 2 2 x 1 5 3 2 1 } 2 2 (24) 2 5 } 5 6 1 } 3 3. Find the slope of the perpendicular bisector. 2 1 } 5 2 m 1 1 } } 3 5 23 4. Use point-slope form: y 2 2 5 23 (x 2 ( 21 )) or y 5 23x 2 1 . An equation for the perpendicular bisector of AB is y 5 23x 2 1 . Checkpoint Complete the following exercises. 3. Find the midpoint of the line segment joining (26, 5) and (1, 1). 1 2 5 } , 3 2 2 4. Write an equation for the perpendicular bisector of the line segment joining A(25, 6) and (3, 22). y 5 x 1 3 234 Lesson 9.1 Algebra 2 Notetaking Guide Copyright © Holt McDougal. All rights reserved.
Your Notes 9.2 Graph and Write Equations of Parabolas Goal p Graph and write equations of parabolas that open left or right. VOCABULARY Focus Directrix STANDARD EQUATION OF A PARABOLA WITH VERTEX AT THE ORIGIN The standard form of the equation of a parabola with vertex at (0, 0) is as follows: Equation Focus Directrix Axis of Symmetry x2 5 4py (0, p) y 5 Vertical ( ) y2 5 4px (p, 0) x 5 Horizontal ( ) Copyright © Holt McDougal. All rights reserved. Lesson 9.2 Algebra 2 Notetaking Guide 235
Page 1 and 2: Your Notes 9.1 Apply the Distance a
Page 3 and 4: Your Notes Checkpoint Complete the
Page 5: Your Notes Homework Example 4 Find
Page 9 and 10: Your Notes Example 1 Graph an equat
Page 11 and 12: Your Notes Homework Example 2 Write
Page 13 and 14: Your Notes 9.3 Graph and Write Equa
Page 15 and 16: Your Notes Checkpoint Graph the equ
Page 29 and 30: Your Notes Example 2 Write an equat
Page 31 and 32: Your Notes Homework Example 3 Solve
Page 33 and 34: Your Notes 9.6 Translate and Classi
Page 35 and 36: Your Notes Example 1 Graph the equa
Page 37 and 38: Your Notes Write an equation of the
Page 39 and 40: Your Notes Example 4 Write an equat
Page 41 and 42: Your Notes Homework CLASSIFYING CON
Page 43 and 44: Your Notes 9.7 Solve Quadratic Syst
Page 45 and 46: Your Notes Example 2 Solve a linear
Page 47 and 48: Your Notes Example 3 Solve a quadra
Page 49 and 50: Your Notes Homework Example 4 Solve
Page 51 and 52: Focus On Graphing Use after Lesson
Page 53 and 54: Your Notes Homework Example 2 Use e
Page 55 and 56: Words to Review Give an example of
Page 57 and 58:
Co-vertices Hyperbola 2 Conic secti
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