6th Grade · The Number System
Reflection
6.NS.C.6b
Definition
A mirror image of a point across an axis, which changes the sign of one coordinate.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- (3, 2) reflected over the y-axis becomes (−3, 2).
- Reflecting across an axis flips the sign of one coordinate.
Key rule
Reflecting a point is like a mirror image across an axis.
Memory hook
Flip the sign, mirror the point.