Graph of the First Inequality

Oct 13, 2025 by wbrum.org 141 views

**Graph the Solution Set of the System of Inequalities: Which Ordered Pair is Included in the Solution Set?**

Understanding the Problem

In this article, we will explore the solution set of a system of inequalities and determine which ordered pair is included in the solution set. The system of inequalities consists of two linear inequalities:

${ \begin{align*} y &< x - 3 \\ y &\leq -\frac{2}{3}x + 4 \end{align*} }$

Graphing the Inequalities

To graph the solution set, we need to graph each inequality separately and then find the intersection of the two graphs.

Graphing the First Inequality

The first inequality is y < x - 3. To graph this inequality, we need to graph the line y = x - 3 and then shade the region below the line.

Graph of the First Inequality

The graph of the first inequality is a line with a slope of 1 and a y-intercept of -3. The region below the line is shaded to indicate that the solution set lies below the line.

Graphing the Second Inequality

The second inequality is y ≤ -2/3x + 4. To graph this inequality, we need to graph the line y = -2/3x + 4 and then shade the region below the line.

Graph of the Second Inequality

The graph of the second inequality is a line with a slope of -2/3 and a y-intercept of 4. The region below the line is shaded to indicate that the solution set lies below the line.

Finding the Intersection of the Two Graphs

To find the intersection of the two graphs, we need to find the point where the two lines intersect.

Finding the Intersection Point

To find the intersection point, we can set the two equations equal to each other and solve for x.

x - 3 = -2/3x + 4

Solving for x, we get:

x = 7/5

Substituting x into one of the original equations, we get:

y = 7/5 - 3

y = -2/5

The intersection point is (7/5, -2/5).

Determining the Solution Set

The solution set is the region where the two shaded regions overlap. Since the first inequality is y < x - 3, the solution set lies below the line y = x - 3. Since the second inequality is y ≤ -2/3x + 4, the solution set lies below the line y = -2/3x + 4.

The Solution Set

The solution set is the region below both lines, bounded by the lines y = x - 3 and y = -2/3x + 4.

Checking the Ordered Pairs

We are given two ordered pairs to check: (0, -3) and (-5, 2).

Checking the First Ordered Pair

To check the first ordered pair (0, -3), we need to plug in x = 0 and y = -3 into both inequalities.

For the first inequality, we get:

-3 < 0 - 3

-3 < -3

This is true.

For the second inequality, we get:

-3 ≤ -2/3(0) + 4

-3 ≤ 4

This is true.

Since both inequalities are true, the ordered pair (0, -3) is included in the solution set.

Checking the Second Ordered Pair

To check the second ordered pair (-5, 2), we need to plug in x = -5 and y = 2 into both inequalities.

For the first inequality, we get:

2 < -5 - 3

2 < -8

This is false.

For the second inequality, we get:

2 ≤ -2/3(-5) + 4

2 ≤ 4 + 10/3

2 ≤ 22/3

This is true.

Since the first inequality is false, the ordered pair (-5, 2) is not included in the solution set.

Conclusion

In this article, we graphed the solution set of a system of inequalities and determined which ordered pair is included in the solution set. We found that the ordered pair (0, -3) is included in the solution set, while the ordered pair (-5, 2) is not included in the solution set.

Q&A

Q: What is the solution set of the system of inequalities?

A: The solution set is the region below both lines, bounded by the lines y = x - 3 and y = -2/3x + 4.

Q: How do I graph the solution set?

A: To graph the solution set, you need to graph each inequality separately and then find the intersection of the two graphs.

Q: How do I determine which ordered pair is included in the solution set?

A: To determine which ordered pair is included in the solution set, you need to plug in the x and y values of the ordered pair into both inequalities and check if both inequalities are true.

Q: What is the intersection point of the two lines?

A: The intersection point is (7/5, -2/5).

Q: Why is the ordered pair (0, -3) included in the solution set?

A: The ordered pair (0, -3) is included in the solution set because both inequalities are true when x = 0 and y = -3.

Q: Why is the ordered pair (-5, 2) not included in the solution set?

A: The ordered pair (-5, 2) is not included in the solution set because the first inequality is false when x = -5 and y = 2.