Functions
Alg 2 · Unit 2
One-to-One Functions
The horizontal line test
Curriculum standard — Understand stage of the Thinking Ladder
Concept first
One-to-One Functions begins with meaning — what it is and why it holds — before any procedure. The structure comes first; computation follows.
Definition
One-to-One Functions
The precise meaning of this topic, stated in mathematical terms.
A plain-language restatement so the definition is understood, not just memorized.
Three pathways, one topic