Scatter plots and line of best fit

The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding.  What is the equation of the line of best fit?

• y = -25x + 170
• y = 25x + 170
• y = -(5/8) x + 170
• y = (5/8) x + 170

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.C.7

The graph above shows a line of best fit for data collected on the amount earned by waiters and waitresses last week in relation to the number of tables they served.  What is the equation of the line of best fit?

• y = (5/3) x + 375
• y = (1/3) x + 475
• y = (5/3) x + 475
• y = (1/3) x + 375

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

The graph  shows a line of best fit for the data collected on the amount of cell phone bills in relation to the number of minutes used.  What is the equation of the line of best fit.

• y = (1/2) x + 3
• y = (1/2) x + 15
• y = (1/40) x 
• y = (1/40) x + 15

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

Looking at the graph, what is the correlation between the x and y variables?

• y increases as x increases
• y is constant
• y decreases as x descreases
• y decreases as x increases

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

CCSS.HSS.ID.C.8

Which scatterplot most likely has a line of best fit represented by y = - 2x + 1

• W
• X
• Y
• Z

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x
• y = 30x
• y = 30x + 300
• y = (3/2)x + 300

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.C.7

What type of correlation does this scatter plot have?

• positive 
• negative
• none
• all of the above

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.8

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 pages would be in a book with 6 chapters. 

• ≅100 pages
• ≅170 pages
• ≅60 pages
• ≅20 pages

Tags

CCSS.HSA.CED.A.2

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

Based on this scatter plot, a student with 6 absences should get approximately what score on the final exam? 

• ≅ 58
• ≅ 92
• ≅ 100
• ≅ 76

Tags

CCSS.HSS.ID.B.6

CCSS.HSS.ID.C.7

What type of association does this graph have?

• positive 
• negative
• none
• all of the above