Finding Trends with Scatter Plots

What is a line of best fit used for?

• To make predictions

• To make the graph look pretty

• To connect the points

Level 1: Determine the type of correlation.

• Positive

• Negative

• No Correlation

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

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

• y = 3x

• y = x + 3

• 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:

The graph shows a negative association.

• True

• False

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

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

Write the equation of the trend line in slope-intercept form.

Write an equation of the trend line in slope-intercept form.

Write an equation of the trend line in slope-intercept form.