To determine which coordinate grid correctly plots the points (1, 2), (2, 4), and (3, 1), let's analyze each option:

1. Point (1, 2) means that at $x = 1$, $y = 2$.
2. Point (2, 4) means that at $x = 2$, $y = 4$.
3. Point (3, 1) means that at $x = 3$, $y = 1$.

Now let's check each grid:

• Grid A:

  • (1, 2): Correct.
  • (2, 4): Correct.
  • (3, 1): Correct.
  • Conclusion: Grid A is correct.

• Grid B:

  • (1, 2): Correct.
  • (2, 4): Correct.
  • (3, 1): Incorrect. This point is plotted at $(3, 2)$ instead of $(3, 1)$.
  • Conclusion: Grid B is incorrect.

• Grid C:

  • (1, 2): Incorrect. This point is plotted at $(1, 1)$.
  • Conclusion: Grid C is incorrect.

• Grid D:

  • (1, 2): Incorrect. This point is plotted at $(1, 3)$.
  • Conclusion: Grid D is incorrect.

Final Answer: Grid A correctly shows the points (1, 2), (2, 4), and (3, 1).

Let me know if you'd like further clarification or more details.

Here are 5 related questions you might find interesting:

1. How do you plot negative coordinates on a graph?
2. What are the quadrants of a Cartesian plane?
3. How do you determine the slope of a line given two points?
4. How can you check if three points are collinear?
5. How do you reflect a point over the x-axis and y-axis?

Tip: When plotting points, always ensure the x-coordinate comes first, followed by the y-coordinate.