Trend Line

What is a scatter plot?

• A graph that shows the relationship of two data sets.
• A graph drawn using rectangular bars to show how large each value is.
• A graph that shows information that is connected in some way.
• A graph that shows data changing over time.

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

What type of correlation?
As the temperature outside is going higher and the amount of ice cream sales. 

• Positive correlation
• Negative correlation
• No correlation

What type of association (correlation) does this graph have?

• positive 
• negative
• none
• all of the above

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

About how many male math teachers were there in 2006?

• 15
• 30
• 35
• 45

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2

Find the slope for the trend line using points (2,2) and (4,3)
Use m= (Y2-Y1)/(X2-X1)

• 2
• 1/2
• -2
• -1/2

Which best describes the form of this scatterplot?

• linear
• nonlinear
• scattered

Tags

CCSS.8.SP.A.1

Which sentence describes the relationship shown on this scatterplot?

• As the temperature decreases, the visitors increase. 
• As the temperature increases, the number of visitors increases. 
• As the visitors increase, the temperature decreases. 
• No correlation

Tags

CCSS.8.F.B.5

CCSS.8.SP.A.1

CCSS.8.SP.A.2

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books.  Use the trend line to predict how many chapters would be in a book with 180 pages. 

• 12 chapters
• 15 chapters
• 18 chapters
• 21 chapters

Tags

CCSS.8.F.B.4

CCSS.8.SP.A.1

CCSS.8.SP.A.2

CCSS.8.SP.A.3

Based on the graph, if Joe earned $400, how many hours did he work?

• 25 hours
• 35 hours
• 45 hours
• 15 hours

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSS.ID.C.7

Which scatter plot shows a linear relationship between x and y?

• Graph A
• Graph B
• Graph C
• Graph D

Tags

CCSS.8.SP.A.1

CCSS.8.SP.A.2