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Graph the solution set of each system of inequalities. \(\left\\{\begin{array}{r}2 x+y<3 \\ x-y>2\end{array}\right.\)

Short Answer

Expert verified
The solution to the system of inequalities is the area of overlap between the two individual shaded regions of each inequality. This solution can be clearly seen in the graph.

Step by step solution

01

Graph the First Inequality

To graph the inequality \(2x + y < 3\), treat it first as an equation (i.e. \(2x + y = 3\)) and graph it as a straight line. This line will be a boundary that separates the two regions of the graph. When plotting, you will notice it intercepts the y-axis at \(3\) and the x-axis at \(1.5\).
02

Shade the solution Region for the First Inequality

Since the inequality is \(2x + y < 3\), the solution will be below this boundary line. So you must shade the region below the line in order to represent all the points (x, y) satisfying this inequality. It's a good idea to test a point, such as (0,0), to be sure about the direction of the shading. If the point makes the inequality true, then the shading is on the side of that point.
03

Graph the Second inequality

The same steps are followed for the second inequality \(x - y > 2\). Initially, it is treated as an equation (i.e. \(x - y = 2\)) and plotted on the same graph. When plotted, it will be recognized as a line passing through the points (0, -2) and (2, 0).
04

Shade the solution Region for the Second Inequality

Since the inequality is \(x - y > 2\), we shade the area above this line. A point such as (0,0) can be tested by replacing its coordinates in the inequality. If the inequality is true with this point, the shading is on the same side of the point.
05

Identify the Intersection of The Two Shaded Regions

The solution set for the system of inequalities is the intersection of the solution sets for each individual inequality. This means the solution is the area where the shaded regions for both inequalities overlap.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Solution Set
When working with a system of inequalities, the solution set is essentially the collection of all possible solutions that satisfy all inequalities in the system simultaneously. For the given exercise, this means finding the region where the conditions from both inequalities \(2x + y < 3\) and \(x - y > 2\) are true. Initially, you graph each inequality separately to identify these conditions. The solution set appears as the overlapping shaded area on the graph, where both individual solution regions meet. This shaded area represents every coordinate pair (x, y) that makes both inequalities valid.
Intersection of Regions
To find the intersection of regions, you must look at where the shaded areas of each inequality overlap on the graph. Intersecting means that this is the area where the solution set of both inequalities is valid at the same time. Each inequality will define a half-plane, and the intersection of these half-planes is the key to identifying the solution. Here, the first inequality yields a region below its boundary line (determining one half-plane), while the second inequality gives a region above its line. Ultimately, only the points falling within both these regions will satisfy the system of inequalities. These points form the crucial intersection of the regions.
Shading Regions
Shading regions in the graph tells you visually where the solutions to a particular inequality lie. When shading, you select the appropriate area that fulfills the inequality condition. For example:- For \(2x + y < 3\), shade below the line \(2x + y = 3\). - For \(x - y > 2\), shade above \(x - y = 2\).Choosing a test point such as (0,0) can help ensure the correct region is shaded, as substituting these values into the inequality determines if they satisfy the condition. Correct shading is essential as it reveals the visual representation of possible solutions and helps to easily identify intersections.
System of Inequalities
A system of inequalities consists of two or more inequalities considered together. Solving a system involves finding all solutions that satisfy all the inequalities simultaneously. In contrast to equations which have distinct point solutions, inequalities have entire regions as solutions. By understanding the individual regions defined by each inequality, you graph them to see where these regions overlap—showing us the combined solution space. Graphical representation aids in visualizing not just the solution regions for each inequality, but also how these interact to give the solution set for the entire system. This concept is vital, as it denotes not just solving multiple inequalities, but understanding how their solutions can be interrelated geometrically.

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