Worked Example 1
Plotting a Point
Where is (−3, 2.5) on the coordinate plane?
- 1Start at the origin (0, 0).
- 2Move 3 units left (x is negative), then 2.5 units up (y is positive).
- 3Left and up is Quadrant II.
Answer: In Quadrant II
Florida Grade 6 Math · Geometric Reasoning
MA.6.GR.1.1: The Coordinate Plane
What this Grade 6 benchmark means, worked examples, common mistakes, and a free printable worksheet.
Created by a Florida mom · Published by Tropical Learning LLC
What Is Benchmark MA.6.GR.1.1?
Students plot ordered pairs with positive and negative rational coordinates in all four quadrants and on both axes. The first number (x) tells how far left or right; the second (y) tells how far up or down.
Points with opposite x-coordinates and the same y-coordinate, like (3, 2) and (−3, 2), are reflections across the y-axis. Points with opposite y-coordinates, like (4, 5) and (4, −5), are reflections across the x-axis.
Official benchmarkExtend previous understanding of the coordinate plane to plot rational number ordered pairs in all four quadrants and on both axes. Identify the x- or y-axis as the line of reflection when two ordered pairs have an opposite x- or y-coordinate.
On the FAST test: part of the Grade 6 reporting category Geometric Reasoning, Data Analysis, and Probability, which is about 25–36% of the test.
Worked Examples
Worked Example 2
Finding the Line of Reflection
(4, −5) and (4, 5) are reflections of each other. Across which axis?
- 1The x-coordinates are the same.
- 2The y-coordinates are opposites, so one point is above the x-axis and one is below it, the same distance away.
Answer: The x-axis
Common Mistakes to Watch For
Switching x and y
Wrong:(2, −4) is plotted 2 down and 4 right.
x comes first: move 2 right, then 4 down.
Naming the wrong axis of reflection
Wrong:(−2, 6) and (2, 6) reflect across the x-axis.
The x-coordinates are opposites, so the points are mirror images across the y-axis.
Helpful Math Tip
Remember "run before you jump": move along the x-axis first, then up or down.
Related Grade 6 Skills
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