Step 2 Check one point that is obviously in a particular half-plane of that line to see if it is in the solution set of the inequality. Notice that the graph of the line contains the point 0,0so we cannot use it as a checkpoint.

To obtain this form solve the given equation for y. Later studies in mathematics will include the topic of linear programming. Therefore, the system has as its solution set the region of the plane that is in the solution set of both inequalities.

The number lines are called axes. Since 3,2 checks in both equations, it is the solution to the system. We must now check the point 3,4 in both equations to see that it is a solution to the system.

In this section we will discuss the method of substitution. The solution set is the half-plane above and to the right of the line. First, start at the origin and count left or right the number of spaces designated by the first number of the ordered pair.

Study them closely and mentally answer the questions that follow. We may merely write m - 6.

A system of two linear equations consists of linear equations for which we wish to find a simultaneous solution. Compare these tables and graphs as in example 3. We then find x by using the equation. Again, use either a table of values or the slope-intercept form of the equation to graph the lines.

Replace the inequality symbol with an equal sign and graph the resulting line. Since we are dealing with equations that graph as straight lines, we can examine these possibilities by observing graphs. Rene Descartes devised a method of relating points on a plane to algebraic numbers. Their point of intersection will be the solution of the system.©B K2I01K2M oK Zuwt ua8 LSUoUf ZtowBairxe l HLPLpCE.R W XA0l olu Br5iVgihut Qsq 8rhevs4ePrQvOeHd S.v Z QMjaldNec pwxiit6hB cIXnof Vitn tiMtre x TAUlgPe db 5rgaR V Writing, Solving, and Graphing Inequalities in One Variable.

In the inequality -4 y > 30, solve for y. To solve this problem, we want to isolate the variable y, just as we would to solve an equation. We can do this by dividing both sides of the inequality by Add to each side in order to isolate the term 2k.

Combine like terms. Write a compound inequality for each graph.

62/87,21 This graph represents an intersection. Both endpoints are closed circles which include the endpoints. The compound inequality is í x 62/87,21 The graphs do not intersect, so it represents a union.

Both endpoints are. To graph the solution to this system we graph each linear inequality on the same set of coordinate axes and indicate the intersection of the two solution sets. Note that the solution to a system of linear inequalities will be a collection of points. Fit an algebraic two-variable inequality to its appropriate graph.

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Writing and Graphing Inequalities How can you use a number line to represent WRITING Explain how the graph of x ≤ 6 is different from the graph of x −2 x ≤ −2 A.

DownloadWriting an inequality for each graph

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