함수
정의역·치역·일대일대응
단원 세부 학습자료
함수에서 변하는 양과 변하지 않는 규칙은 무엇일까?
3분 훑어보기
함수 is a 수학 unit in 공통수학2. In this unit, the student looks for quantity, relation, representation, and justification. The first pass is deliberately simple: identify the situation, point to the one part that changes, and say what stays stable. 정의역·치역·일대일대응 is used as a small laboratory, so the learner can touch the idea before writing it as a rule. Start with a concrete case, then name the general idea after the pattern is visible.
Choose one visible part of the 공통수학2 situation and decide whether it is an input, a condition, a source clue, or a result.
Take the first observation from 함수 and express it in a second form: sentence, table, diagram, map note, timeline note, or symbolic statement.
표준 · 심화 설명
함수 becomes reliable when the learner can move between a source-backed curriculum term and a visible action. The working routine is to change one value and compare the table, expression, graph, or diagram before naming the rule. After each change, the student records what was expected, what actually happened, and which clue supports the explanation. This makes the unit more than a title in the index: it becomes a repeatable reasoning pattern for 공통수학2.
A stronger explanation of 함수 connects the unit to later learning. The student should be able to state the controlling condition, describe the result with precise language, and justify the claim with use a worked value, a visual representation, and one sentence of reasoning together. When the same idea appears in a different problem, the learner transfers the structure rather than memorizing the surface example. That transfer is the acceptance target for M-CM2-07.
예시
Choose one visible part of the 공통수학2 situation and decide whether it is an input, a condition, a source clue, or a result.
Use 정의역·치역·일대일대응 to change only that part. Keep the rest of the situation fixed, then compare the before and after states. Record the comparison with the unit ID M-CM2-07 so the explanation stays tied to this verified unit.
The point is not speed. The point is to make one controlled change and explain it with quantity, relation, representation, and justification.
Take the first observation from 함수 and express it in a second form: sentence, table, diagram, map note, timeline note, or symbolic statement.
Check whether the second form preserves the same relationship. If the meaning changes, mark the exact word, number, position, or condition that caused the shift.
함수 is learned deeply when the same idea can survive a change of representation.
Pick a case that is smaller, larger, earlier, later, more formal, or more exceptional than the first example.
Predict the result before using the interactive surface. Then compare the prediction with the displayed result and revise the explanation in one clear sentence.
A boundary case shows whether the learner understands 공통수학2 structure or is only copying the first example.
미니 문제
- 1개념 확인
In 함수, what must be separated before the learner writes the final rule or interpretation?
- 2적용 문제
When using 정의역·치역·일대일대응, what should the learner record after changing one control or choice?
- 3실수 교정 · 전이
A learner gives an answer for 함수 but cannot point to evidence. What is the best correction?
정답과 해설
This separation prevents guessing. It also matches the 수학 reasoning focus of quantity, relation, representation, and justification.
The record turns an interactive action into evidence. Without it, 함수 becomes clicking rather than learning.
The correction transfers the unit from memory to reasoning. It asks the learner to use use a worked value, a visual representation, and one sentence of reasoning together instead of relying on surface recall.
흔한 실수
Ask what changes, what stays fixed, and what evidence proves the result. This directly addresses the common error of jumping straight to a formula before deciding which quantity changes.
Change one condition, record the result, and only then compare a second condition. This keeps the cause-and-effect chain visible.
실생활 적용
함수 helps students handle planning, measurement, money, data, or repeated patterns. The learner should name the situation, identify the evidence, and explain how the 공통수학2 idea changes the decision.
A student can use this unit during peer explanation by saying: "I changed this one part, I observed this result, and this evidence supports my answer." That sentence format works across later 수학 units.
다음 단원
출처
- Repository master unit index · docs/00-MASTER-INDEX.md · M-CM2-07 row in docs/00-MASTER-INDEX.md
- NCIC 2022 revised national curriculum resources · https://www.ncic.re.kr/ · 수학 공통수학2 공통수학2 curriculum structure
- High-school credit system course context · https://www.hscredit.net/ · common-math-2 course context for 공통수학2
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