Finding Trends with Scatter Plots

A group of hikers is descending, and the elevation of several of the hikers after a certain number of minutes is shown in the scatter plot.

True or False:

The scatter plot is demonstrating a linear relationship.

• True

• False

Tags

CCSS.8.F.A.3

When scatter plots demonstrate a linear relationship, a(n) ​ (a)   line can be used to show the general pattern of the data.

• straight

• points

• outlier

• association

• cluster

Tags

CCSS.8.F.A.3

What is another term for trend line?

• Straight line

• Linear

• Line of Best Fit

Tags

CCSS.8.EE.B.5

How do I determine the y-intercept of the trend line from a graph?

• look where the line crosses the y-axis

• use the slope formula

Tags

CCSS.8.EE.B.5

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

• Positive, strong
• Positive, weak
• Negative, strong
• Negative, weak

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 scatter plot represents this relationship?

• A

• B

• C

• D

Tags

CCSS.HSF-LE.A.1B

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Tags

CCSS.8.EE.B.5

Which of the following would be the most accurate equation for the scatter plot?

• y = -2x - 7

• y = -x + 7

• y = 3x + 7

• y = 25x + 7