Scatter Plot Trend Lines and Predictions

The graph shows a line of best fit for data collected on the value of used cards in relation to the number of  years since they were purchased.  What is the equation of the line of best fit?

• y = 750 x + 9500

• y = - 750 x +11000

• y = (3/4) x + 11

• y = - (3/4) x + 11000

Tags

CCSS.8.EE.B.5

Mrs. Moises, the school counselor, keeps a candy jar in her office for students.  During one week, she kept count of how many students came to visit her and the number of candies in the jar, as show in the scatter plot.  Based on the trend line, what is the best prediction for the number of candies in the jar when 30 students visit her?

• 90

• 180

• 135

• 150

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

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.

• 70

• 90

• 80

• 60

Tags

CCSS.HSF.IF.A.2

You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?

• As x increases, y decreases

• As x increases, y increases

• As x decreases, y decreases

Tags

CCSS.HSF-LE.A.1B

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

• A

• B

• C

• D

What type of association does this scatter plot show?

• positive linear association

• negative linear association

• no association

• nonlinear association

Tags

CCSS.HSF-LE.A.1B

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.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.IF.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.

Tags

Statistics

Scatter Plots