Math Problem Statement

Two lines are graphed on the coordinate plane. Which description of the lines is TRUE?

Solution

To analyze the problem, let’s go through it step-by-step.

  1. Observe the Lines: In the graph, we have two lines that appear to be parallel, indicating they likely have the same slope but may have different yy-intercepts.

  2. Slope and Intercept Analysis: Since the lines look parallel, they should have identical slopes. However, their yy-intercepts are different, which means they are separated by a fixed vertical distance.

  3. Translation Distance: The options mention translations by 3 or 9 units, so we should check how far apart the lines are in terms of vertical distance (which corresponds to translation if they’re parallel).

  4. Correct Answer Evaluation:

    • Option A: States they have the same slopes but different yy-intercepts, with a translation of 9 units.
    • Option B: Incorrect since it mentions different slopes.
    • Option C: Incorrect translation distance (3 units).
    • Option D: Also states different slopes, so it's incorrect.

Thus, Option A is correct, as it accurately states that the lines have the same slopes (parallel), different yy-intercepts, and are translated by 9 units.

Would you like a more detailed explanation of how I determined the translation distance, or do you have further questions?

Related Questions

  1. How do you determine the slope of a line from a graph?
  2. What does it mean for two lines to be parallel on a coordinate plane?
  3. How can you identify the yy-intercept from a graph?
  4. What is the significance of translation in geometry?
  5. Why are translations described by distances (e.g., 3 units, 9 units) in such problems?

Tip

Parallel lines have identical slopes; any vertical distance between them represents the difference in their yy-intercepts.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Slopes and Intercepts
Parallel Lines
Translations

Formulas

Slope formula: (y2 - y1) / (x2 - x1)
Translation in coordinate geometry

Theorems

Properties of Parallel Lines
Translation Theorem

Suitable Grade Level

Grades 8-10