Best Fit Line

Scatter Plots and Best Fit Line

What is a scatter plot?

A scatter plot shows the relationship between a set of data with two variables, graphed as ordered pairs on a coordinate plane. The relationship is known as a correlation or association.

Multiple Choice

Determine the correlation.

• positive

• negative

• no correlation

Multiple Choice

Determine the correlation.

• positive

• negative

• no correlation

Multiple Choice

• positive

• negative

• no correlation

Best Fit Line

A line that models the trend of the data.

Multiple Choice

Determine the correlation.

• positive

• negative

• no correlation

• 8

Best Fit Line (Linear regression)

• Graph the given data.

• Draw a line that represents the trend of the data.

• Find the slope of two points on the line.

• Find the y-intercept.

• Write the equation.

• Graph the given data.

Multiple Choice

Use (1997, 13) and (2005, 22) to find the slope.

• 8/9

• 9/8

• 9

• 8

Choose either (1997, 13) or (2005, 22) to find the y-intercept.

Write the equation of the line.