8th Grade · Expressions & Equations
Origin
8.EE.B.5
Definition
The point where the x-axis and y-axis intersect on a coordinate plane, with coordinates zero, zero. Proportional relationships always pass through the origin.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- Every proportional graph passes through (0,0).
- Buy 0 items, pay 0 dollars — that's the origin in context.
Key rule
Proportional relationships always pass through the origin; non-proportional ones don't.
Memory hook
Where the axes cross — (0,0).