Help review homework visit:

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Help review homework visit

• http//www.keymath.com/DG/dynamic/exterior_angle_s
  um.html

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Section 3.5

• TSWBAT graph lines given their equations and to
  write equations of lines.

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Review Algebra I

• y mx b
• m.
• b.
• (x, y)..

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Slope-Intercept form of a line

• y mx b Ex. Graph y ½ x 3

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Standard form of a Line

• Ax By C, where A, B and C are whole numbers
  (no fractions)
• Ex. 6x 3y 12 (use x- y- intercept)

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Continue to graph 6x 3y 12

• Where we found the x-intercept (2,0) and the
  y-intercept (0,4)plot connect

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You Try (p155 4 7)

• 4) y -5/3 x 2 7) 5x 2y 20

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Given any equation, can you write it in
slope-intercept form?

• Simply, SOLVE FOR Y! ? (p155)
• 13) Y 2x 4 15) 2x 6y 6

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Remember slope formula?

• y2 y1 where (x1, y1) and (x2, y2)
• x2 x1 are just two points
  on the line.
• Point-Slope form y - y1 m(x x1)
• m.
• (x1, y1) .

m
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Point-Slope form of a line

• y-y1 m(x x1) (p155)
• 19) R(-3, 5) m -1 23) D(0,5), E (5, 8)

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You Try

• Write an equation in point-slope form (p155)
• 27) L(-1, 0), M(-3, -1)

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THINK!!!

• Write an equation of a horizontal line that
  contains the point (4, 7).

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You Try (Think!!! again! ?)

• Write an equation for a vertical line that
  contains the point (0, -1)

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Last two, to graph!

• P155 33 37
• 33) x3 37) y 6

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Exercises

• P155 1 70
• WBp34