Math Problem Statement

How do I graph the inequality y < 1 - 3x?

Solution

To graph the inequality y<13xy < 1 - 3x, we need to follow these steps:

  1. Convert the inequality to slope-intercept form: The inequality y<13xy < 1 - 3x is already in slope-intercept form, y<mx+by < mx + b, where m=3m = -3 (slope) and b=1b = 1 (y-intercept).

  2. Graph the boundary line: The boundary is y=13xy = 1 - 3x. Since the inequality is strictly less than (<<), we use a dashed line for the graph. This line passes through:

    • (0,1)(0, 1), where x=0x = 0 (the y-intercept), and
    • (1,2)(1, -2), since y=13(1)=2y = 1 - 3(1) = -2.
  3. Shade the solution region:

    • The inequality y<13xy < 1 - 3x means we shade below the dashed line.
  4. Choose the correct graph: By analyzing the graphs provided:

    • The correct graph is bottom right, where the line is dashed, and the region below the line is shaded.

Do you want a detailed explanation of any of these steps or more help with similar questions?

Related Questions

  1. What is the significance of the dashed vs. solid lines in inequality graphs?
  2. How do you determine the region to shade for y>y > or y<y < inequalities?
  3. What if the inequality was y13xy \leq 1 - 3x? How would the graph change?
  4. Can inequalities ever result in vertical or horizontal lines? If so, how?
  5. How can you verify your solution for inequalities graphically?

Tip: Always test a point (like (0,0)(0, 0)) to confirm which side of the line to shade!

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Math Problem Analysis

Mathematical Concepts

Inequalities
Graphing Linear Equations
Slope-Intercept Form

Formulas

y = mx + b

Theorems

Graphing inequalities
Dashed vs. solid lines in inequalities

Suitable Grade Level

Grades 8-10