# Curve Fitting

 Download Embed close Embed a running copy of this simulation Use this HTML to embed a running copy of this simulation. You can change the width and height of the embedded simulation by changing the "width" and "height" attributes in the HTML. Embed an image that will launch the simulation when clicked
Click to Run
Use this HTML code to display a screenshot with the words "Click to Run". Polynomials Error Analysis PhET is supported by and educators like you.
 Back to HTML5 Version

### Topics

• Polynomials
• Error Analysis

### Description

Drag data points and their error bars and watch the best-fit polynomial curve update instantly. You choose the type of fit: linear, quadratic, or cubic. The reduced chi-square statistic shows you when the fit is good. Or you can try to find the best fit by manually adjusting fit parameters.

### Sample Learning Goals

• Explain how the range and uncertainty and number of data points affect correlation coefficient and chi squared
• Describe how correlation coefficient and chi squared can be used to indicate how well a curve describes the data relationship
• Apply understanding of Curve Fitting to designing experiments

### Standards Alignment

#### Common Core - Math

HSS-ID.B.6
Represent data on two quantitative variables on a scatter plot, and describe how the variables are related.
HSS-ID.B.6a
Fit a function to the data; use functions fitted to data to solve problems in the context of the data. Use given functions or choose a function suggested by the context. Emphasize linear, quadratic, and exponential models.
HSS-ID.B.6b
Informally assess the fit of a function by plotting and analyzing residuals.
Version 2.02

### Teacher Tips

 Overview of sim controls, model simplifications, and insights into student thinking ( PDF ).

### Teacher-Submitted Activities

Concept questions for Physics using PhET (Inquiry Based) Trish Loeblein UG-Intro
HS
MC Physics
Algebra-based Physics Semester one lessons, clicker questions, and schedule in pdf (Inquiry Based) Trish Loeblein UG-Intro
HS
Lab
Demo
HW
Physics
Alignment of PhET sims with NGSS Trish Loeblein updated by Diana López MS
HS
Other Biology
Earth Science
Physics
Chemistry
How do PhET simulations fit in my middle school program? Sarah Borenstein MS Other Earth Science
Biology
Chemistry
Physics
PhET Sims Aligned to the Chemistry Curriculum Julia Chamberlain UG-Intro
HS
Other Chemistry
MS and HS TEK to Sim Alignment Elyse Zimmer HS
MS
Other Physics
Biology
Chemistry
Capacitors - Introduction- Bassam Rashed UG-Adv
UG-Intro
HS
Guided
HW
Lab
Remote
Demo
Physics
Mapping of PhET and IBDP Physics Jaya Ramchandani HS Other Physics
PhET Simulations Aligned for AP Physics C Roberta Tanner HS Other Physics
Line of best fit activity Dave Dalton HS Lab
HW
Mathematics
Moteur en PhET Bernard Lacour Other Lab Physics
커브 핏팅 SIM 사용 설명서 Wha Kuk Lee UG-Intro
HS
HW
Lab
Demo
Earth Science
Chemistry
Mathematics
Physics
Longitud de un péndulo y su periodo. Denis Salazar HS
MS
UG-Intro
Demo
Lab
HW
Guided
Mathematics
Physics
Afrikaans All Afrikaans Krommepassing
Albanian All shqip Përshtatja e Lakores
Arabic All العربية توفيق المنحنى
Arabic (Saudi Arabia) All العربية (السعودية) توفيق المنحنى
Basque All Euskara Doiketa-kurba
Bosnian All Bosanski Interpolаcijа podаtаkа polinomom (krivom)
Catalan All català Ajust de corbes
Chinese (Simplified) All 中文 (中国) 曲线拟合
Chinese (Traditional) All 中文 (台灣) Curve Fitting 曲線配適
Croatian All hrvatski Prilagodba podataka polinomom
Danish All Dansk Kurvetilpasning
Dutch All Nederlands Functie van een grafiek bepalen
Estonian All Eesti Graafikul olevate punktide sobitamine
Finnish All suomi Käyrän sovitus mittausarvoihin
French All français Ajustement des courbes
Georgian All ქართული მრუდის მორგება
German All Deutsch Trendlinien anpassen
Greek All Ελληνικά Προσαρμογή καμπύλης
Hebrew All עברית התאמת עקומות
Hungarian All magyar Görbeillesztés
Indonesian All Bahasa Indonesia Mengepas Kurva
Italian All italiano curve-fitting
Japanese All 日本語 曲線あてはめ
Kazakh All Kazakh Формуларды сайлау
Korean All 한국어 커브 핏팅
Macedonian All македонски Интерполација на податоци
Mongolian All Монгол (Монгол) Муруйд Дөхөлт хийх
Norwegian Bokmal All Norsk bokmål Kurvetilpasning
Norwegian Nynorsk All Norwegian Nynorsk Kurvetilpassing
Persian All فارسی انطباق منحني
Polish All polski Krzywa dopasowania
Portuguese (Brazil) All português (Brasil) curve-fitting
Serbian All Српски Интерполација података полиномом (кривом)
Slovak All Slovenčina Aproximácia krivky
Slovenian All Slovenščina Prilagajanje krivulje
Spanish All español Ajustando la Curva
Spanish (Mexico) All español (México) Ajustando la Curva
Spanish (Peru) All español (Perú) Ajustando la Curva
Turkish All Türkçe Uygun Eğriyi Çıkarmak
Turkmen All Turkmen Egri çyzygy gabat getirmek (approksimasiýa)
Vietnamese All Tiếng Việt Vẽ đồ thị theo thực nghiệm
Windows Macintosh Linux
Microsoft Windows
XP/Vista/7/8.1/10
Macromedia Flash 9 or later
OS X 10.9.5 or later
Macromedia Flash 9 or later
Macromedia Flash 9 or later
Design Team Third-party Libraries Thanks To