8-3 (draft)

Which trend line is the best model of the data shown in the scatter plot?

• A

• B

• C

• D

Which trend line is the best model of the data presented? Explain.

• A

• B

• C

Which trend line is the best model of the data shown?

• A

• B

• C

• D

Why is Line C the best model of the data?

• Because the points are evenly distributed above the line

• Because the points are evenly distributed below the line

• Because the points are evenly distributed above and below the line

• Because the points are not distributed evenly

What does a trend line represent in a scatter plot?

• The average of the data points

• The relationship between two variables

• The highest value in the data set

• The lowest value in the data set

In a scatter plot, what does it mean if the points are close to the trend line?

• There is a weak correlation between the variables

• There is a strong correlation between the variables

• There is no correlation between the variables

• The variables are unrelated

If the trend line in a scatter plot is horizontal, what does it indicate about the relationship between the variables?

• There is a positive correlation

• There is a negative correlation

• There is no correlation

• The variables are inversely related

Which of the following is NOT a possible trend in a scatter plot?

• Positive trend

• Negative trend

• No trend

• Circular trend

What does a negative trend in a scatter plot indicate?

• As one variable increases, the other variable also increases

• As one variable increases, the other variable decreases

• There is no relationship between the variables

• The variables are both decreasing

How can you determine the strength of the relationship between two variables in a scatter plot?

• By counting the number of data points

• By looking at the slope of the trend line

• By observing how close the points are to the trend line

• By measuring the distance between the highest and lowest points