Math Problem Statement

Graph the inequality 5x + 6y < 42

Solution

The inequality you are asked to graph is:

5x+6y<425x + 6y < 42

To graph this inequality, follow these steps:

Step 1: Convert the inequality to an equation

We start by converting the inequality into an equation to find the boundary line:

5x+6y=425x + 6y = 42

Step 2: Find the intercepts of the boundary line

  • X-intercept: Set y=0y = 0 and solve for xx: 5x+6(0)=42    5x=42    x=425=8.45x + 6(0) = 42 \implies 5x = 42 \implies x = \frac{42}{5} = 8.4 So, the x-intercept is (8.4,0)(8.4, 0).

  • Y-intercept: Set x=0x = 0 and solve for yy: 5(0)+6y=42    6y=42    y=426=75(0) + 6y = 42 \implies 6y = 42 \implies y = \frac{42}{6} = 7 So, the y-intercept is (0,7)(0, 7).

Step 3: Draw the boundary line

Plot the points (8.4,0)(8.4, 0) and (0,7)(0, 7), then draw a dashed line through them. The line will be dashed because the inequality is strict (<<).

Step 4: Determine the region to shade

Since the inequality is 5x+6y<425x + 6y < 42, the region below the boundary line (the side where yy is smaller) will be shaded.

Final Graph:

  • A dashed line from (8.4,0)(8.4, 0) to (0,7)(0, 7).
  • The region below this line will be shaded to represent the inequality 5x+6y<425x + 6y < 42.

Would you like further details or another explanation?

Related Questions:

  1. How do you solve systems of inequalities graphically?
  2. What does it mean if an inequality has a “greater than or equal to” sign?
  3. How can you verify a solution for a system of inequalities?
  4. How does graphing an inequality differ from graphing an equation?
  5. What happens to the graph if we multiply the inequality by a negative number?

Tip:

When graphing inequalities, always pay attention to whether the inequality includes \leq or \geq, as this affects whether the boundary line is solid or dashed!

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Math Problem Analysis

Mathematical Concepts

Linear Inequalities
Graphing

Formulas

Linear Equation: 5x + 6y = 42

Theorems

Properties of Linear Inequalities

Suitable Grade Level

Grades 9-10