Scatter Plots Best Line of Fit

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

• W

• X

• Y

• Z

Tags

CCSS.8.EE.B.5

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.8.EE.B.5

Looking at the graph showing a line of best fit, what is the correlation shown?

• Length of life is constant

• Length of life increases as amount of sunlight increases

• Length of life increases as amount of sunlight decreases

• Length of life decreases as amount of sunlight increases

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

• Graph A

• Graph B

• Graph C

• Graph D

Tags

CCSS.8.F.A.3

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

What type of correlation does this graph have?

• positive 

• negative

• none

• all of the above

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

A group of students did an experiment to see how drinking cups of coffee right before bed affected sleep.  The results are shown below in the scatter plot with a line of best fit.  Use the given line of best fit to approximate the rate of change relative to the scatter plot.

• (7/5) hours/cup

• (5/7) hours/cup

• - (7/5) hours/cup

• - (5/7) hours/cup

Tags

CCSS.HSF.LE.B.5

A teacher made the following graph showing absences vs. final grades.  Predict the grade of a student that has 7 absences.

• 45

• 50

• 60

• 70

Tags

CCSS.HSF-BF.B.4A

A teacher made the following graph showing the number of hours that a student studied for an exam versus their exam grade.  Predict the grade of a student if they studied for 3.5 hours.  

• 80

• 100

• 85

• 90

Tags

CCSS.HSF.IF.A.2