2025, Question 3 · Modeling a Periodic Context · 6 points

Sinusoidal motion of a vibrating guitar string

Give coordinates for five labeled points on the graph of a string's displacement, find the constants of a sine model, and describe the sign, direction, concavity and rate of change of the function between two of the points.

1 Read the question

The question is College Board's, from the 2025 exam. It starts on page 6 of the PDF.

Open Question 3 (PDF, page 6)

2 Write your answer

Answer each part the way you would on the exam, in full sentences, with your work shown. Your writing saves as you type.

3 Score it

Score your answer against College Board's scoring guidelines, one point at a time. Give yourself a point only when your answer says what the guideline asks for.

Scoring guidelines (PDF, page 10) What the exam readers saw (Chief Reader report)

Question, scoring guidelines and Chief Reader report: College Board. The title and summary are ours.