Exploring A1 Unit 3 Day 9 Concepts

This video tutorial covers the concept of scatter plots and correlation, focusing on the correlation coefficient and its significance in determining the strength and direction of a linear relationship. It provides a step-by-step guide on creating scatter plots and lines of best fit using Desmos, and includes practical examples and exercises to reinforce understanding of weak and strong correlations.

What is the main topic of the unit 3 day 9 notes?

• Pie Charts

• Bar Graphs

• Scatter Plots

• Histograms

What does a correlation coefficient (r) close to 1 indicate?

• Strong positive correlation

• Strong negative correlation

• No correlation

• Weak negative correlation

Tags

CCSS.HSS.ID.B.5

Which range of r values indicates a strong negative correlation?

• -0.7 to -1

• 0.7 to 1

• -0.3 to -0.69

• 0.3 to 0.69

Tags

CCSS.HSS.ID.B.5

What is the first step in creating a scatter plot in Desmos?

• Calculate the r value

• Round the m value

• Add a table

• Enter the squiggle equation

What is the squiggle equation used in Desmos to find the line of best fit?

• y1 ~ mx1 + b

• y1 = mx1 + b

• y1 ~ mx + b

• y = mx1 + b

Tags

CCSS.8.EE.B.5

If the r value is 0.66, what type of correlation does it indicate?

• No correlation

• Weak positive

• Strong positive

• Strong negative

Tags

CCSS.HSS.ID.B.5

In the example with the number of species added to the endangered list, what is the m value?

• 0.7

• -14.5

• 15.2

• 173.8

Tags

CCSS.HSF.LE.B.5

What does an r value of -0.9 indicate?

• Strong negative correlation

• Strong positive correlation

• Weak positive correlation

• No correlation

Tags

CCSS.HSS.ID.B.5

In the Cleveland Browns example, what is the line of best fit equation?

• y = 0.9x + 0.7

• y = 0.66x + 0.7

• y = -14.5x + 173.8

• y = 0.7x + 15.2

Tags

CCSS.8.EE.C.8C

Which correlation coefficient indicates no correlation?

• 0.7

• 0.66

• 0.17

• -0.9

Tags

CCSS.HSS.ID.B.5