Math Problem Statement

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Consider the diagram below. Determine a possible equation for the green line.

Solution

To determine a possible equation for the green line, let's analyze the given diagram:

  1. Slope Analysis:

    • The red line has the equation y=2x+3y = 2x + 3. Its slope is m=2m = 2.
    • The green line forms alternate interior angles (110° and 70°) with the black transversal. Since alternate interior angles are equal, the green and red lines are parallel.
  2. Parallel Lines:

    • Parallel lines have the same slope. Hence, the slope of the green line is also m=2m = 2.
  3. Equation of the Green Line:

    • The green line's equation is of the form y=2x+by = 2x + b, where bb is the yy-intercept.
    • To determine bb, we would need a point on the green line. Since the question only asks for a possible equation, we can choose any reasonable yy-intercept, bb.
  4. Answer:

    • A possible equation for the green line is y=2x4y = 2x - 4 (or any equation of the form y=2x+by = 2x + b).

Would you like more details on how the slope or alternate interior angles were used?


Related Questions:

  1. What are alternate interior angles, and why are they equal for parallel lines?
  2. How do we calculate the slope of a line given its equation?
  3. What is the general form of a linear equation?
  4. How do you determine the equation of a line given a point and a slope?
  5. Why do parallel lines always have the same slope?

Tip:

For parallel lines, focus on the slope—it's the key to finding equations when you know one line's equation.

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Math Problem Analysis

Mathematical Concepts

Geometry
Algebra
Linear Equations
Slopes of Parallel Lines

Formulas

Slope-intercept form: y = mx + b

Theorems

Parallel lines have equal slopes
Alternate interior angles theorem

Suitable Grade Level

Grades 8-10