Scatterplots Equations

5.3 Scatter Plots and Lines of Fit

L.O: 
1. Determine whether a scatter plot shows a positive, negative, or no correlation.
2. describe its meaning in the situation.

Tuesday, Sep 8

Example 1

Determine whether each scatter plot shows a positive, negative, or no correlation. If the correlation is positive or negative, describe its meaning in the situation.

Multiple Choice

Determine whether each scatter plot shows a positive, negative, or no correlation

• Positive

• Negative

• No Correlation

• positive and negative

Multiple Choice

Determine whether each scatter plot shows a positive, negative, or no correlation.

• Positive

• Negative

• No Correlation

Multiple Select

The scatter plot shows the number of CDs in millions that were sold from 2011 to 2016.Use the points (2, 2485.6) and (6, 1172.5) to write an equation of the line of fit in slope-intercept form. Let x be the years since 2010.

• y = -328.275x + 3142.15

• y = -308.275x + 3042.15

• y = -32x + 314

Multiple Choice

The scatter plot shows the number of CDs in millions that were sold from 2011 to 2016.

If the trend continued, about how many CDs were sold in 2019?

• 134.395

• 148.987

• 187.675

• 209.368

Multiple Choice

Determine whether each scatter plot shows a positive, negative, or no correlation. If the correlation is positive or negative, describe its meaning in the situation.

• No correlation, The x-values (daily high temperature in degrees Fahrenheit) and the y-values (number of apples sold) are not related

• Negative, The x-values (daily high temperature in degrees Fahrenheit) increase the y-values (number of apples sold) decrease

• Positive, The x-values (daily high temperature in degrees Fahrenheit) increase the y-values (number of apples sold) increase

• Negative, The x-values (daily high temperature in degrees Fahrenheit) and the y-values (number of apples sold) are not related

Open Ended

Describe the trend in the data shown in the scatter plot and the relationship between x and y.

Open Ended

Describe a real-life situation that could be modeled by the given scatter plot. Explain your reasoning.