Grade 6 Math · Topic 29

The Coordinate Plane

The coordinate plane is formed by two perpendicular number lines: the horizontal x-axis and the vertical y-axis. They meet at the origin (0,0). Every point has an ordered pair (x,y): x tells you left/right, y tells you up/down. The plane is split into four quadrants.

Lesson alignment: 6.NS.C.6.c · 6.NS.C.8 · Take your time. You can return to this lesson whenever you need it.

Explore visually

Measure a horizontal or vertical grid segment

Move the points along one shared coordinate. Count unit intervals and compare with the absolute difference.

Think first: Predict what will change when you adjust one value, then use the model to check your idea.

Ready? Reveal the model and try your prediction

Swipe horizontally to see the full diagram.

Turn on JavaScript to adjust this model. The examples and practice below work without it.

Grade 6 core skill · 6.NS.C.8

Find distance between points on one grid line

When two points share the same y-coordinate, the segment is horizontal. Subtract their x-coordinates and take the absolute value. When they share the same x-coordinate, do the same with their y-coordinates.

Example: A(−3, 2) and B(4, 2)

The y-coordinates match, so move horizontally. Count from −3 to 0 (3 units), then 0 to 4 (4 more units).

Distance = |4 − (−3)| = 7 units

Distance is never negative. The absolute value gives the length of the segment.

Do not add the coordinates just because one is negative. Compare positions on the axis and count the unit intervals between them.

Quick check: C(5, −4) and D(5, 3)

The x-coordinates match, so the segment is vertical. |3 − (−4)| = 7 units.

Follow the worked examples

Read each step, then cover the explanation and see if you can explain why it works.

Worked example 1

In which quadrant is (-3, 5)?

Start by writing the calculation clearly: x = -3 is negative (left of origin); y = 5 is positive (above origin). Negative x and positive y is Quadrant II.

Answer: Quadrant II

Worked example 2

Plot A(2,-4). Describe how you move from the origin.

From (0,0), move right 2 along the x-axis, then down 4 along the y-direction. A lands in Quadrant IV.

Answer: 2 right, 4 down (Quadrant IV).

Try a few on your own

Work these on paper first. Open “Check” when you are ready to compare your answer.

  1. (4, 7) →
    Check

    Quadrant I

  2. (-2, 6) →
    Check

    Quadrant II

  3. (-5, -3) →
    Check

    Quadrant III

  4. (8, -1) →
    Check

    Quadrant IV

  5. (0, 4) →
    Check

    y-axis

  6. (-6, 0) →
    Check

    x-axis

  7. (0, 0) →
    Check

    origin

  8. (3, -9) →
    Check

    Quadrant IV

Try this situation 1

A map uses a coordinate plane. The library is at (-4, 3) and the school is at (5, -2). Which quadrant is each in?

Show a worked solution

Answer: Library: Quadrant II. School: Quadrant IV.

Library has x<0, y>0 → II. School has x>0, y<0 → IV.

Try this situation 2

Where is the point (0, -7) located — on an axis or in a quadrant?

Show a worked solution

Answer: On the y-axis (below the origin).

Whenever x=0, the point is on the y-axis. y=-7 means 7 units below the origin.

Fresh questions · saved on this device

Practice this skill

10 question pool

Try a fresh set each time. Answer one question, check your thinking, and read the explanation. If you miss one, return to the visual model and try another round.

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Check what you learned

Answer these five questions on your own. You can review the explanations after you submit and try again whenever you like. This short check is for practice, not a grade.

1. Find the distance between (−3, 2) and (4, 2).

2. Find the distance between (5, −4) and (5, 3).

3. Which pair shares a horizontal grid line?

4. Why use absolute value to find a coordinate distance?

5. Points A(−2, −3) and B(−2, 5) share which coordinate, and what is their distance?

Practice and finish

Try the linked topic quiz for more practice. If something is tricky, return to the example and look for the step that changes the numbers or representation.

Open the practice quiz

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More Grade 6 resources

Use these free materials if you want another explanation, extra paper practice, or a broader review.