Choose The Inequality That Represents The Following Graph.

Unlocking the Mathematical Enigma: Inequality Representation from Graphs

Navigating the intricate world of graphs and inequalities can be a daunting task. But fear not! This blog post will unravel the mystery, guiding you through the process of identifying the inequality that accurately describes a given graph.

The Perplexing Puzzle of Graphs and Inequalities

Graphs and inequalities, two pillars of mathematical problem-solving, often intertwine, leaving us with a quandary. Which inequality best encapsulates the relationship depicted in a graph? This question has the potential to plunge students and math enthusiasts into a sea of confusion, but understanding the underlying principles can turn this perplexing puzzle into a conquerable challenge.

Deciphering the Graph’s Secrets

To identify the inequality that represents a graph, we need to closely examine its characteristics. The slope, y-intercept, and key points all provide valuable clues. The slope tells us the rate of change, while the y-intercept indicates the starting point. By analyzing these elements together, we can determine whether the graph represents a linear inequality (y-intercept form: y < mx + b or y > mx + b) or a system of linear inequalities (bounded by intersecting lines).

Embracing Precision and Clarity

Choosing the correct inequality is essential for accurately describing the region represented by the graph. A slight deviation can alter the meaning and limit the applicability of our analysis. Therefore, it is imperative to approach this task with precision and clarity, avoiding hasty generalizations and ensuring that the selected inequality perfectly captures the essence of the graph.

Choose The Inequality That Represents The Following Graph.

The Inequality that Represents the Graph

The provided graph is a representation of a linear function. Linear functions are characterized by their constant slope and can be expressed in the form y = mx + b, where m represents the slope and b represents the y-intercept.

Determining the Slope and Y-Intercept

To determine the slope and y-intercept of the graph, we can identify two points on the line and use the slope-intercept formula:

slope (m) = (y2 - y1) / (x2 - x1)
y-intercept (b) = y - mx

Using the points (1, 3) and (3, 7) from the graph, we can calculate the slope and y-intercept as follows:

m = (7 - 3) / (3 - 1) = 2
b = 3 - 2(1) = 1

The Inequality

Since the graph represents a line that is increasing from left to right, the inequality that describes it is:

y > 2x + 1

This inequality states that for any given value of x, the corresponding value of y must be greater than the expression 2x + 1.

Additional Insights into the Inequality

Interpretation of the Coefficients

  • Slope (m = 2): The positive value of the slope indicates that the line has a positive slope, meaning it rises from left to right. The slope represents the rate of change of y with respect to x. In this case, for every unit increase in x, y increases by 2 units.
  • Y-Intercept (b = 1): The y-intercept represents the value of y when x is 0. In this case, the line intersects the y-axis at the point (0, 1), indicating that when x is 0, y is equal to 1.

Implications of the Inequality

The inequality y > 2x + 1 implies several things about the graph:

  • Boundedness: Points that lie above the line (i.e., those that satisfy the inequality) are considered to be in the feasible region. Points that lie below the line (i.e., those that do not satisfy the inequality) are infeasible.
  • Asymptotic Behavior: As x approaches negative infinity, the graph approaches the horizontal line y = 1.
  • Non-Zero Intercepts: The graph intersects both the x-axis and the y-axis at non-zero points.

Applications of the Inequality

The inequality y > 2x + 1 can be used to solve a variety of mathematical problems, including:

  • Linear Programming: The inequality can be used to define constraints in linear programming problems, where the goal is to optimize a given function subject to certain constraints.
  • Graphing: The inequality can be used to plot the graph of the linear function.
  • Inequality Solving: The inequality can be solved to find the values of x and y that satisfy the given condition.


1. What is the slope of the graph?

The slope of the graph is 2.

2. What is the y-intercept of the graph?

The y-intercept of the graph is 1.

3. What does the inequality y > 2x + 1 represent?

The inequality represents the points that lie above the line y = 2x + 1 on the graph.

4. What is the feasible region defined by the inequality?

The feasible region is the set of points that satisfy the inequality y > 2x + 1, which are the points that lie above the line.

5. What are some applications of the inequality?

The inequality can be used in linear programming, graphing, and inequality solving.

Video Writing a Linear Inequality from a Graph