Math Problem Statement

y=4x+2 y=−14x+5 y=4x+9 y+4=−14(x−3) y=−4x+6 y−4=4(x+3) y=14x+8 y=−14x+9 The equation of line A is y=4x−3 .

Sort the following equations of lines as parallel or perpendicular to line A . Not all equations will be used.

Parallel to Line A Perpendicular to Line A

Solution

To determine which lines are parallel or perpendicular to line A, we need to compare their slopes.

Line A equation: y=4x3y = 4x - 3

  • The slope of line A is 4.

For parallel lines:

  • Lines with the same slope as line A (i.e., slope = 4) are parallel.

For perpendicular lines:

  • Lines whose slopes are the negative reciprocal of the slope of line A (i.e., slope = -1/4) are perpendicular.

Now, let's identify the slope of each equation:

  1. y=4x+2y = 4x + 2

    • Slope = 4
      Parallel to line A
  2. y=14x+5y = -14x + 5

    • Slope = -14
      Neither parallel nor perpendicular
  3. y=4x+9y = 4x + 9

    • Slope = 4
      Parallel to line A
  4. y+4=14(x3)y + 4 = -14(x - 3)

    • Rewrite as: y=14x+38y = -14x + 38
    • Slope = -14
      Neither parallel nor perpendicular
  5. y=4x+6y = -4x + 6

    • Slope = -4
      Neither parallel nor perpendicular
  6. y4=4(x+3)y - 4 = 4(x + 3)

    • Rewrite as: y=4x+16y = 4x + 16
    • Slope = 4
      Parallel to line A
  7. y=14x+8y = 14x + 8

    • Slope = 14
      Neither parallel nor perpendicular
  8. y=14x+9y = -14x + 9

    • Slope = -14
      Neither parallel nor perpendicular

Summary:

Parallel to Line A:

  • y=4x+2y = 4x + 2
  • y=4x+9y = 4x + 9
  • y4=4(x+3)y - 4 = 4(x + 3)

Perpendicular to Line A:

  • None of the equations have a slope of -1/4, so no perpendicular lines.

Would you like more details or have any questions?


Here are five related questions to expand on this topic:

  1. How do you determine the slope of a line from an equation?
  2. Can two lines with different y-intercepts be parallel?
  3. What is the geometric relationship between parallel and perpendicular lines?
  4. How can we transform a given equation into slope-intercept form y=mx+by = mx + b?
  5. What are other methods to check if two lines are perpendicular?

Tip: Always rewrite equations into slope-intercept form y=mx+by = mx + b to easily identify the slope.

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Math Problem Analysis

Mathematical Concepts

Algebra
Linear Equations
Slopes
Parallel and Perpendicular Lines

Formulas

Slope-intercept form y = mx + b
Condition for parallel lines: Same slope
Condition for perpendicular lines: Slopes are negative reciprocals

Theorems

Parallel Line Theorem
Perpendicular Line Theorem

Suitable Grade Level

Grades 8-10