Steps on How to Graph Linear InequalitiesIf this is your first time learning how to graph a linear inequality such as y > x + 1 , you will realize that after going through this lesson, it boils all down to graphing the boundary line (dashed or solid) and shading the appropriate region (top or bottom). Show So where do we start? Below are the suggested steps that you can follow in order to do it right. Step 1: Always start by isolating the variable \color{red}y on the left side of the inequality. These are the four symbols of inequalities:
Step 2: Change the inequality to equality symbol. For now, you will deal with a line. Step 3: Graph the boundary line from step 2 in the XY-plane. The following are the three common methods that you can use to graph a line. It doesn’t matter which one you choose.
In this step, you are constructing the boundary line that would separate or cut the XY-plane into two regions.
Step 4: The last step is to shade one side or region of the boundary line.
Step 5: Use this optional step to check or verify if you have correctly shaded the side of the boundary line.
Below is the graph of the inequality y > x + 1. Step 1: The inequality is already in the form that we want. That is, the variable y is isolated on the left side of the inequality. Step 2: Change inequality to equality. Therefore, y > x + 1 becomes y = x + 1. Step 3: Now graph the y = x + 1. Use the method that you prefer when graphing a line. In addition, since the original inequality is strictly greater than symbol, \Large{\color{red}>}, we will graph the boundary line as a dotted line. Step 4: The original inequality is y > x + 1. The greater than symbol implies that we are going to shade the top area or region. Step 5: To check if we have done it correctly, let’s pick any points on the shaded region. Suppose we pick \color{blue}\left( { - 3,2} \right). Now, we substitute and evaluate the coordinates of the test point with the original inequality. \left( { - 3,2} \right) \Rightarrow x = - 3,\,\,y = 2 y > x + 1 2 > -3 + 1 2 > -2 ✅
Yes! We have successfully graphed the inequality \large{\color{green}y>x+1}. You might also be interested in: Solving Linear Inequalities Graphing Linear Inequalities Examples Graphing Systems of Linear Inequalities Solving Compound Inequalities How do you find the linear inequality from a graph?Plug your slope and a point into the formula y = mx + B, in which "m" is the slope, (x, y) is a point on the line and "b" is the y-intercept, to find the equation governing the inequality line. Plugging in (0, 0), you obtain 0 = 0 + b, so b = 0. Rewriting the equation, you obtain y = x/2.
How do you graph a linear inequality step by step?Step 1: Graph the boundary line. ... . Step 2: Plug in a test point that is not on the boundary line. ... . Step 3: Shade in the answer to the inequality. ... . Step 1: Graph the boundary line. ... . Step 2: Plug in a test point that is not on the boundary line. ... . Step 3: Shade in the answer to the inequality. ... . Step 1: Graph the boundary line.. How do you solve linear inequalities?When solving linear inequalities: If the coefficient of x is positive, the inequality sign maintains its direction when we divide by the coefficient to isolate x. If the coefficient of x is negative, we must reverse the direction of the inequality sign when we divide by the coefficient to isolate x.
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