Scatter Plots and 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 equation of the trend line is y = 2500x-125

• 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 group of hikers descends about 250 feet every minute.

Hint: What's the unit rate, slope?

• 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 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:

There are several outliers in the scatter plot.

• 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

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

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

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