Math Problem Statement

Select all the ordered pairs that are solutions of the inequality y > 7x - 3.

Solution

To determine which ordered pairs satisfy the inequality y>7x3y > 7x - 3, let's evaluate each option by substituting the values of xx and yy into the inequality:

Given Inequality:

y>7x3y > 7x - 3

Checking Each Option:

Option A: (2,15)(2, 15)

  1. Substitute x=2x = 2 and y=15y = 15 into y>7x3y > 7x - 3.
  2. Calculate 723=143=117 \cdot 2 - 3 = 14 - 3 = 11.
  3. Check if 15>1115 > 11, which is true.

Option B: (3,15)(-3, -15)

  1. Substitute x=3x = -3 and y=15y = -15 into y>7x3y > 7x - 3.
  2. Calculate 7(3)3=213=247 \cdot (-3) - 3 = -21 - 3 = -24.
  3. Check if 15>24-15 > -24, which is true.

Option C: (0,3)(0, -3)

  1. Substitute x=0x = 0 and y=3y = -3 into y>7x3y > 7x - 3.
  2. Calculate 703=03=37 \cdot 0 - 3 = 0 - 3 = -3.
  3. Check if 3>3-3 > -3, which is false (since it’s equal, not greater).

Option D: (1,5)(1, 5)

  1. Substitute x=1x = 1 and y=5y = 5 into y>7x3y > 7x - 3.
  2. Calculate 713=73=47 \cdot 1 - 3 = 7 - 3 = 4.
  3. Check if 5>45 > 4, which is true.

Option E: (2,18)(-2, -18)

  1. Substitute x=2x = -2 and y=18y = -18 into y>7x3y > 7x - 3.
  2. Calculate 7(2)3=143=177 \cdot (-2) - 3 = -14 - 3 = -17.
  3. Check if 18>17-18 > -17, which is false.

Conclusion:

The ordered pairs that satisfy the inequality y>7x3y > 7x - 3 are:

  • A. (2, 15)
  • B. (-3, -15)
  • D. (1, 5)

Would you like further details on any specific steps or have questions about this solution?


Here are some additional questions that might expand your understanding:

  1. How do we determine the region of solutions for linear inequalities on a graph?
  2. What would change if the inequality was y7x3y \geq 7x - 3?
  3. How can we verify solutions to inequalities algebraically versus graphically?
  4. How does the slope and intercept in y>7x3y > 7x - 3 affect the solution set?
  5. What methods are available to solve systems of linear inequalities?

Tip: When solving inequalities, always substitute values to check if they satisfy the inequality fully, as the answer can hinge on strict versus non-strict inequality signs.

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Math Problem Analysis

Mathematical Concepts

Inequalities
Coordinate Geometry
Linear Equations

Formulas

y > 7x - 3

Theorems

Properties of Inequalities

Suitable Grade Level

Grades 8-10