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Inequalities in Two Varıancs ality. 46. \( y<2 x+1 \)

Ask by Reid Dunn. in the United States
Feb 03,2025

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Answer

The inequality \( y < 2x + 1 \) represents all points below the line \( y = 2x + 1 \).

Solution

To analyze the inequality \( y < 2x + 1 \), we can follow these steps: 1. **Identify the boundary line**: The inequality \( y < 2x + 1 \) can be rewritten as an equation to find the boundary line: \[ y = 2x + 1 \] This is a linear equation with a slope of 2 and a y-intercept of 1. 2. **Graph the boundary line**: Since the inequality is strict (i.e., \( < \)), we will draw a dashed line for \( y = 2x + 1 \) to indicate that points on the line are not included in the solution set. 3. **Determine the region of the inequality**: To find which side of the line satisfies the inequality \( y < 2x + 1 \), we can test a point that is not on the line. A common choice is the origin (0, 0). - Substitute \( x = 0 \) and \( y = 0 \) into the inequality: \[ 0 < 2(0) + 1 \implies 0 < 1 \] This statement is true, so the region that includes the origin is part of the solution set. 4. **Shade the appropriate region**: Since the inequality is \( y < 2x + 1 \), we will shade the area below the dashed line. ### Summary - The boundary line is \( y = 2x + 1 \) (dashed). - The solution set is the region below this line, including all points where \( y \) is less than \( 2x + 1 \). If you need a visual representation or further analysis, please let me know!

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Bonus Knowledge

Inequalities involving two variables, like \( y < 2x + 1 \), can be visually represented on a Cartesian plane. The line \( y = 2x + 1 \) serves as a boundary but is not included in the solution set since the inequality is strict ("<"). This means the area below this line indicates all the possible solutions; anything below that line satisfies the inequality. It’s like drawing a “no-fly zone” for points that don’t meet the condition! When solving linear inequalities, a common mistake is forgetting to reverse the inequality sign when multiplying or dividing by a negative number, which can flip the whole game! Always keep an eye on that sign—like a referee making sure the rules are followed in a match. It ensures you get the correct area of solutions on that graph!

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