Math Problem Statement

Which of the following systems of inequalities matches the graph shown?

Solution

To determine which system of inequalities matches the graph, we need to analyze the shaded regions and the boundary lines. Here’s how we break it down:

1. Identify the boundary lines:

  • There are two boundary lines shown: one is solid and one is dashed. The solid line indicates that the inequality is either ≤ or ≥, and the dashed line indicates strict inequality (< or >).
  • By examining the slopes and y-intercepts, we can write the equations of the lines:
    • The solid line has a positive slope and intercepts the y-axis at y=6y = -6, and it goes up by 1 for every increase of 1 in xx. This suggests the equation yx6y \geq x - 6.
    • The dashed line has a negative slope and intercepts the y-axis at y=9y = 9, and it falls by 5 units for every increase of 1 in xx. This suggests the equation y5x+9y \leq -5x + 9.

2. Identify the shading:

  • The area above the dashed line is shaded, implying yx6y \geq x - 6.
  • The area below the solid line is shaded, implying y5x+9y \leq -5x + 9.

3. Match the inequalities:

  • From this analysis, the system of inequalities is: y5x+9ANDyx6y \leq -5x + 9 \quad \text{AND} \quad y \geq x - 6

This matches option B: y5x+9ANDy6x10y \leq -5x + 9 \quad \text{AND} \quad y \geq 6x - 10.

Final Answer: B

Would you like more details on how to solve inequalities graphically or have any questions?


Here are 5 related questions to expand on this topic:

  1. How do you graph inequalities with two variables?
  2. What is the difference between strict inequalities and inclusive inequalities in graphs?
  3. How can you solve a system of inequalities using substitution or elimination?
  4. How do boundary lines affect the solution region in an inequality system?
  5. Can a system of inequalities have more than one solution region?

Tip: Always double-check the slope and intercept when matching inequalities to graphs.

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Math Problem Analysis

Mathematical Concepts

Linear Inequalities
Graphing Inequalities
Systems of Inequalities

Formulas

Equation of a line: y = mx + b
Slope-intercept form: y = mx + b

Theorems

Properties of Linear Inequalities
Graphing Inequalities in Two Variables

Suitable Grade Level

Grades 8-10