Math Problem Statement

if one were to graph the solution to the following inequality: y > 2x + 3 which of the following coordinates would be in the region indicated by in the inequality equation above?

a. (2,2) b. (2, -2) c. (-2,2) d. (-2,-2) e. (2,3)

Solution

To solve this problem, we need to determine which of the given points lies in the region where the inequality y>2x+3y > 2x + 3 is true.

Step 1: Understand the Inequality

The inequality y>2x+3y > 2x + 3 describes a region above the line y=2x+3y = 2x + 3 on a graph.

Step 2: Substitute the Coordinates into the Inequality

We will substitute each point into the inequality to see if it satisfies the condition y>2x+3y > 2x + 3.

  1. Point (2,2): y=2and2x+3=2(2)+3=4+3=7y = 2 \quad \text{and} \quad 2x + 3 = 2(2) + 3 = 4 + 3 = 7 2>72 > 7 is false.

  2. Point (2,-2): y=2and2x+3=2(2)+3=4+3=7y = -2 \quad \text{and} \quad 2x + 3 = 2(2) + 3 = 4 + 3 = 7 2>7-2 > 7 is false.

  3. Point (-2,2): y=2and2x+3=2(2)+3=4+3=1y = 2 \quad \text{and} \quad 2x + 3 = 2(-2) + 3 = -4 + 3 = -1 2>12 > -1 is true.

  4. Point (-2,-2): y=2and2x+3=2(2)+3=4+3=1y = -2 \quad \text{and} \quad 2x + 3 = 2(-2) + 3 = -4 + 3 = -1 2>1-2 > -1 is false.

  5. Point (2,3): y=3and2x+3=2(2)+3=4+3=7y = 3 \quad \text{and} \quad 2x + 3 = 2(2) + 3 = 4 + 3 = 7 3>73 > 7 is false.

Conclusion:

The only point that satisfies the inequality y>2x+3y > 2x + 3 is (c) (-2,2).


Would you like more details or have any questions? Here are some related questions to consider:

  1. What is the slope-intercept form of a linear equation?
  2. How do you graph a linear inequality on a coordinate plane?
  3. What changes if the inequality is y2x+3y \geq 2x + 3 instead of y>2x+3y > 2x + 3?
  4. How do you find the x- and y-intercepts of the line y=2x+3y = 2x + 3?
  5. What does the inequality y<2x+3y < 2x + 3 represent on the graph?

Tip: When graphing an inequality, remember that if the inequality is strict (i.e., >> or <<), the boundary line is dashed. If it is non-strict (i.e., \geq or \leq), the boundary line is solid.

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Math Problem Analysis

Mathematical Concepts

Inequalities
Linear Equations
Coordinate Geometry

Formulas

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Theorems

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Suitable Grade Level

Grades 9-12