# Write a system of inequalities for the graph of the equation

If the inequality is of the form then the region below the line is shaded and the boundary line is solid. So that is negative 2 right there.

### How to write a linear inequality

Choose a test point not on the boundary line. Checking points M and N yield true statements. I just want to reinforce that it's not dependent on how far I move along in x or whether I go forward or backward. A strict inequality, such as would be represented graphically with a dashed or dotted boundary line. So if you think about this line, if you think about its equation as being of the form y is equal to mx plus b in slope-intercept form, we figured out b is equal to negative 2. Let's say that x is equal to 2. So it's all the area y is going to be greater than or equal to this line. Recall that a system of linear inequalities is a set of linear inequalities in the same variables. On one side lie all the solutions to the inequality. In order to graph a linear inequality, we can follow the following steps: Graph the boundary line. For example, in Figure 1, the linear inequality is represented on the coordinate plane. Notice that it is not true that and so we shade the half-plane that does not include the origin. If the inequality is then a true statement, we shade the half-plane including that point; otherwise, we shade the half-plane that does not include the point. The purple area shows where the solutions of the two inequalities overlap. Let's say x is equal to 1.

Introduction A solution of a system of linear equalities is any ordered pair that is true for all of the equations in the system. In this case, our system is: Tutorial Details 20 Minutes Pre-requisite Concepts Students should be able to write the equation of a line from its graph and vice versa graph a line from its equationand define and graph a system of linear inequalities.

After completing this tutorial, you will be able to complete the following: Write a system of linear inequalities in two variables that corresponds to a given graph. In this example, we can use the origin 0, 0 as a test point. The purple area shows where the solutions of the two inequalities overlap.

Graphically, we represent an inclusive inequality by representing the boundary line with a solid line. Checking points M and N yield true statements. So it's all the area y is going to be greater than or equal to this line. The boundary line is precisely the linear equation associated with the inequality, drawn as either a dotted or a solid line.

But this inequality isn't just y is equal to negative 3. The line is dashed as points on the line are not true.

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