Objective: To solve a linear inequality 4'12'5

1
Objective To solve a linear inequality 4.12.5
Class Notes Sec 2.6
1. Review

• Find the slope and the y-intercept of y - ¼ x
  2.

• Find the slope of a line perpendicular to
• y

c. Find the slope of the line through (-3, 5)
and (-3, -3).
d. Find the slope of a line parallel to 3x 2y
6.
2
2. Vocabulary

• Inequality a mathematical sentence with one
• of these symbols in it gt, lt, gt, lt

Is greater than
Is less than
Is greater Than or equal to
Is less Than or equal to
b. Solution an ordered pair (x, y) that
makes an inequality true when x and y are
substituted.
Is the ordered pair a solution to 4x 2y gt 8?
3.
Example 1
b. (-2, -9)
a. (3, 3)
3
4.
Graph each
Example 2
b. x lt -3
a. y gt 2
4
5.
Graph each
Example 3
b. 3x y lt 3
a. 3x y lt 3
5
6.
Write an inequality for each word Problem.
Example 4

• You have 200 to spend on CDs and music
• videos. CDs cost 10 and music videos cost
• 15.

b. You receive a 50 gift certificate for a movie
theater. Matinees are 4.50 and evening shows
are 7.50
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Homework p. 111 14, 16, 18, 20, 22, 24-26,
30, 33-35, 36, 42, 46, 50