Exam Strategy
Readiness Check
You are ready when you can (1) name the best function type from a short clue set, (2) justify with CED language (ROC, differences, geometry, piecewise), and (3) list at least one assumption and one domain/range restriction.
Prep Sequence
1. Drill clue → type flashcards. 2. Three finite-difference table reads. 3. Two piecewise vs single-rule decisions. 4. Write assumption templates until automatic. 5. Timed: select + articulate in 4 minutes (no construction).
On the Exam
- Underline clues: constant ROC, unique max, volume, switch point, number of points.
- Choose type before parameters.
- Write: “Assumption: … / Domain: … / Range: …” even if brief.
- For piecewise, name the split value and that intervals do not overlap.
Common Traps
- Picking quadratic only because there is a “curve” with no unique-extremum or 2nd-difference support.
- Using degree 4 for 4 points (degree ≤ 3 for 4 points).
- Forgetting contextual domain ($t\ge 0$).
- Treating overlapping pieces as valid piecewise.
Quick Checklist
- [ ] Function type named with CED clue
- [ ] Piecewise only if regimes differ on nonoverlapping intervals
- [ ] Assumption about consistency or covariation stated
- [ ] Domain restriction stated
- [ ] Range restriction stated when rounding/context needs it