Math Problem Statement

where to shade

Graph each absolute value inequality and determine where to shade.

Solution

To shade the regions for the absolute value inequalities, you'll need to follow these steps:

  1. Plot the boundary: The boundary of each inequality is derived by converting the inequality into an equation. For example, for y>2x3y > 2|x - 3|, first plot the equation y=2x3y = 2|x - 3|.
  2. Identify the region: Based on whether the inequality is "greater than" or "less than", shade the appropriate region.
    • For >> or \geq, shade the region above the boundary.
    • For << or \leq, shade the region below the boundary.

Let’s go through each inequality one by one and determine the correct shading:

  1. y>2x3y > 2|x - 3|

    • Plot the V-shaped graph of y=2x3y = 2|x - 3|, with the vertex at (3,0)(3, 0).
    • Since yy is greater than the boundary, shade above the V-shape.
  2. y3x+2y \geq -3|x| + 2

    • Plot y=3x+2y = -3|x| + 2, an upside-down V-shape with a vertex at (0,2)(0, 2).
    • Since yy \geq, shade on and above the boundary.
  3. yx+3y \leq -|x| + 3

    • Plot y=x+3y = -|x| + 3, another upside-down V-shape with vertex at (0,3)(0, 3).
    • Since yy \leq, shade on and below the boundary.
  4. y<4x4y < 4|x| - 4

    • Plot y=4x4y = 4|x| - 4, with a V-shape and vertex at (0,4)(0, -4).
    • Since y<y <, shade below the V-shape.
  5. y2x+31y \geq 2|x + 3| - 1

    • Plot y=2x+31y = 2|x + 3| - 1, with a vertex at (3,1)(-3, -1).
    • Since yy \geq, shade on and above the boundary.
  6. y12x+2+5y \leq -\frac{1}{2}|x + 2| + 5

    • Plot y=12x+2+5y = -\frac{1}{2}|x + 2| + 5, an upside-down V-shape with vertex at (2,5)(-2, 5).
    • Since yy \leq, shade on and below the boundary.
  7. y>23x12y > \frac{2}{3}|x - 1| - 2

    • Plot y=23x12y = \frac{2}{3}|x - 1| - 2, a V-shape with vertex at (1,2)(1, -2).
    • Since y>y >, shade above the boundary.
  8. y<12x+13y < \frac{1}{2}|x + 1| - 3

    • Plot y=12x+13y = \frac{1}{2}|x + 1| - 3, a V-shape with vertex at (1,3)(-1, -3).
    • Since y<y <, shade below the boundary.

Would you like detailed instructions for graphing and shading any specific inequality?

Here are 5 related questions to explore further:

  1. How do absolute value inequalities affect the shape of the graph?
  2. What happens when you multiply the absolute value by a negative constant?
  3. Can you explain why the vertex of the absolute value graph shifts horizontally?
  4. How do you test a point to verify if it satisfies the inequality?
  5. How can these graphs be used to model real-world situations involving distance or deviations?

Tip: For inequalities with \geq or \leq, don't forget to include the boundary line in the shaded region!

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Math Problem Analysis

Mathematical Concepts

Absolute Value Inequalities
Graphing Inequalities
Piecewise Functions

Formulas

|x| = x when x >= 0 and |x| = -x when x < 0
y = a|x - h| + k, vertex form of absolute value equations

Theorems

Absolute Value Inequality Theorem
Inequality rules: y > boundary means shade above, y < boundary means shade below

Suitable Grade Level

Grades 9-12