A2_11.1.1 Video Lesson - Scatter Plots and Best Fit Line

Before the video lesson, you will first answer some questions to review scatter plots.

Are you ready?

• Yes, let's go!!

• No, not yet.

Tags

CCSS.HSF.IF.B.4

Identify the variables using the data shown.

When plotting, which should be the x-coordinate and which should be the y-coordinate?

• x: number of rubber bands; y: lowest point head reaches (cm)

• x: lowest point head reaches (cm); y: number of rubber bands

• x: balcony height (m); y: number of rubber bands

• x: number of rubber bands; y: balcony height (m)

Tags

CCSS.6.EE.C.9

Go to Desmos.com and create a scatterplot of the data set. You will use to answer the next set of questions.

HELP: Use this link to see a refresher of how: https://youtu.be/ADaNyIf6NhY

Insert a screenshot of your scatterplot here.

Answer explanation

Don't forget to label the x- and y-axes

Tags

CCSS.8.EE.B.5

Which statement best describes the relationship between the variables?

• A positive, roughly linear association

• A negative linear association

• No apparent association

• A strong decreasing exponential relationship

Tags

CCSS.HSF-LE.A.1B

What is the equation for the line of best fit?

Tags

CCSS.8.F.A.3

Using your results in Desmos (linear regression), estimate the lowest point Barbie would fall to if we were going to use 10 rubber bands.

• 93

• 10

• 30

• -3

What is an outlier in a graph?

• A point that follows the pattern of the data

• A point that does not follow the pattern of the data

• A point that is at the center of the graph

• A point that is the highest on the Y axis

What is the formula used to find the LINE of best fit?

Tags

CCSS.8.EE.B.5

What does a positive correlation in a scatter plot indicate?

• Points are evenly dispersed

• Points follow a decreasing pattern

• Points follow an increasing pattern

• Points are random

Tags

CCSS.HSS.ID.B.5

DESMOS:

Using the data in the chart, create a scatter plot in Desmos.

Upload your screenshot here.

NOTE: You will use this data for the remainder CYUs.

Be sure to keep your DESMOS tab open (or save for future reference).

Answer explanation

Did you remember to label your axes before taking a screenshot?

Tags

CCSS.8.SP.A.1