Analyzing Lines of Fit

What is a line of best fit used for?

• To make predictions
• To make the graph look pretty
• To connect the points
• To make it look like you know what you are doing

Tags

CCSS.8.EE.B.5

Which sentence describes the relationship shown on this scatter plot?

• 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.HSS.ID.B.6

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSS.ID.C.8

Is this line an accurate line estimate of best fit for the data?

• Yes

• No

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSS.ID.C.8

Find the slope for the trend line using points (2,2) and (4,3)

• 2
• 1/2
• -2
• -1/2

Tags

CCSS.HSA.REI.C.6

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A
• B
• C
• D

Tags

CCSS.HSF.IF.B.4

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

Students in a group of chess teams submitted data about hours of team practice and the number of matches the team won.  The graph shows the results of the data.  Based on the linear regressions equation y = 3.14x + 3.52, if a team practices 4.5 hours per week next year, which is the best prediction of the number of chess matches a team could expect to win?  

• about 24
• about 12
• about 8
• about 18

Based on the trend line, about how many guests should be expected if the temperature is around 80 degrees?

• 8,300
• 7,300
• 8
• 9,300

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

Predict the grade of a student that has 7 absences.

• 50
• 45
• 70
• 60

Tags

CCSS.HSA.REI.D.10

CCSS.HSA.SSE.A.1

CCSS.HSS.ID.A.1

CCSS.HSS.ID.C.7

What is the best prediction for the number of candies in the jar when 30 students visit her?

• 90
• 180
• 135
• 150

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSA.SSE.A.1

CCSS.HSS.ID.C.7