Exploring Linear and Quadratic Regression with Desmos

This video is part 2 of a series on Desmos graphing calculator tips, focusing on regression. It provides instructions for accessing Desmos, especially for Loudoun County students, and explains how to perform both linear and quadratic regression. The video highlights the differences between linear and quadratic regression, using Desmos to input data and interpret results. It concludes with additional resources for further learning.

What topics were covered in the first video of the series?

• Trigonometry and calculus

• Probability and statistics

• Regression and correlation

• Graphing equations, inequalities, substitution, systems, and zeroes

How can students in Loudoun County Public Schools access the Desmos graphing calculator?

• By logging into LCPs and finding the math folder

• By downloading an app

• By visiting the school library

• By using a different online calculator

What type of regression is specifically covered in this video?

• Quadratic regression

• Linear regression

• Logarithmic regression

• Exponential regression

What is the first step in performing regression in Desmos?

• Adding a table and inputting X and Y values

• Drawing a graph

• Finding the standard deviation

• Calculating the mean

What symbol is used for regression in Desmos instead of the equals sign?

• Caret (^)

• Ampersand (&)

• Asterisk (*)

• Tilde (~)

In linear regression, what does the 'm' in the equation y = mx + b represent?

• Constant

• X-coordinate

• Y-intercept

• Slope

What is the standard form of a quadratic equation used in Desmos for regression?

• ax^2 + bx + c

• y = mx + b

• a^2 + b^2 = c^2

• y = ax + b

What value indicates a strong correlation in regression analysis?

• 0.5

• 0.1

• 0.3

• 0.99

What does the coefficient of determination (R-squared value) indicate in regression analysis?

• The standard deviation

• The median of the data

• The mean of the data

• The strength of the correlation

What shape does a quadratic regression form on a graph?

• A circle

• A parabola

• A straight line

• A hyperbola