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91Ó°ÊÓ

Graph inequality. \(y>1\)

Short Answer

Expert verified
The graph of the inequality \(y>1\) is represented by a dotted horizontal line y=1 with shading above this line to represent all values of y that are greater than 1.

Step by step solution

01

Graph the line y=1

This line is a horizontal line which crosses the y-axis at point (0,1). Plot this line on the graph.
02

Show the inequality y>1

Since the inequality is greater than and not greater than or equal to, the line y=1 will be dotted to show that the values along the line are not included in the solution.
03

Shade the region

The inequality \(y>1\) means the solutions are all the values of y that are greater than 1. To represent that, shade the region above the line y=1 to represent the range of solutions.
04

Verify

Choose a point in the shaded region, not on the line, for example (0, 2). Substitute these values into the original inequality \(y>1\). Since 2>1 is true, that verifies the inequality and the graph.

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Key Concepts

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

Inequality Solutions
Inequality solutions involve determining the values that satisfy a given inequality, such as \(y > 1\). When dealing with inequalities, it's important to understand that they do not represent a single value, but rather a range of values that make the inequality true. In the case of \(y > 1\), the solutions include all real numbers greater than 1. These solutions are not just points, but an entire set of values. To showcase these solutions, different techniques such as graphical methods can be used. This particular method not only helps us visualize the range of solutions but also makes complex problems easier to solve by providing a clear and vivid representation of all potential answers.
Graphical Representation
Graphical representation is a powerful tool in understanding and solving inequalities. When you graph an inequality like \(y > 1\), the first step is to graph the equation associated with the inequality. Here, you would start by graphing the line \(y = 1\). This line is a horizontal line that crosses the y-axis at the point \((0, 1)\). However, in inequalities, the type of line you draw matters. For a strict inequality like \(y > 1\), you use a dotted line. This dotted line indicates that the points on the line \(y = 1\) are not part of the solution set.It's essential to distinguish between strict inequalities (\(<, >\)) and non-strict inequalities (\(\leq, \geq\)). With non-strict inequalities, you would use a solid line to show that the values on the line are included in the solution set, unlike strict inequalities where a dotted line is used.
Shading Regions
Shading regions on a graph helps to visually represent the set of possible solutions to an inequality. For the inequality \(y > 1\), the area that needs to be shaded is all the region above the horizontal line \(y = 1\). This shaded area shows all the possible \(y\) values that are greater than 1, reinforcing the solution set. The direction of shading is determined by the inequality sign. For \(y > 1\), you shade above the line. Conversely, for an inequality like \(y < 1\), you would shade below the line. Shading provides a clear indication of which areas on the graph represent solutions, making it easier to interpret and verify.To ensure accuracy, you can verify the shaded region by selecting a test point that lies within the region. For instance, choosing the point \((0, 2)\) and substituting it in \(y > 1\) confirms the validity of the shaded region since \(2 > 1\) is true. This helps affirm that the graphical representation aligns with the inequality's conditions.

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Most popular questions from this chapter

a. \(A\) student earns \(\$ 15\) per hour for tutoring and \(\$ 10\) per hour as a teacher's aide. Let \(x=\) the number of hours each week spent tutoring and let \(y=\) the number of hours each week spent as a teacher's aide. Write the objective function that models total weekly earnings. b. The student is bound by the following constraints: \(\cdot\) To have enough time for studies, the student can work no more than 20 hours per week. \(\cdot\) The tutoring center requires that each tutor spend at least three hours per week tutoring. \(\cdot\) The tutoring center requires that each tutor spend no more than eight hours per week tutoring. Write a system of three inequalities that models these constraints. c. Graph the system of inequalities in part (b). Use only the first quadrant and its boundary, because \(x\) and \(y\) are nonnegative. d. Evaluate the objective function for total weekly earnings at each of the four vertices of the graphed region. [The vertices should occur at \((3,0),(8,0),(3,17),\) and \((8,12) .]\) e. Complete the missing portions of this statement: The student can earn the maximum amount per week by tutoring for______ hours per week and working as a teacher's aide for______ hours per week. The maximum amount that the student can earn each week is $\$$ _____

What does it mean if a system of linear inequalities has no solution?

When graphing a linear inequality, I should always use \((0,0)\) as a test point because it's easy to perform the calculations when 0 is substituted for each variable.

What is a solution of a system of linear inequalities?

Graph the solution set of system of inequalities or indicate that the system has no solution. $$\left\\{\begin{aligned}x^{2}+y^{2} &<4 \\\y-x^{2} & \geq 0\end{aligned}\right.$$

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