Making Predictions from Scatter Plots with Trend Lines

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 hikers began at an elevation of 2,500 feet.

• True

• False

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:

As time increases, the elevation increases.

• True

• False

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

What is another term for trend line?

• Straight line

• Linear

• Line of Best Fit

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

Match the scatter plot to the equation that could represent the equation of its trend line.

• y = 3x

• y=4x-2

• y = -x + 5

• y = -5x

• The relationship is not linear

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:

There are several outliers in the scatter plot.

• True

• False

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

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 140 pages. 

• 12 chapters

• 19 chapters

• 14 chapters

• 21 chapters

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

• ≅ 58

• ≅ 92

• ≅ 100

• ≅ 76