Exploring Trend Lines and Predictions

What is the primary purpose of a trend line in a scatter plot?

• To highlight the highest and lowest points

• To determine the exact values of data points

• To show the general relationship between variables

• To connect all data points

Which of the following best describes a trend line?

• A line that connects all data points

• A line that represents the trend or correlation between two variables

• A line that always passes through the origin

• A line that shows the exact future values

What should you label your line on paper when drawing a trend line?

• Trend line

• Best fit line

• Data line

• Prediction line

When drawing a trend line, how should the points be distributed?

• All points should be above the line

• All points should be below the line

• There should be about as many points above as below the line

• The line should connect all points

If a baby is 27 inches long, what is its predicted weight according to the trend line?

• 20 lbs

• 25 lbs

• 10 lbs

• 15 lbs

How many hours of sleep is predicted for someone who watches 5 hours of TV?

• 2 hours

• 3.5 hours

• 7 hours

• 5 hours

What is the predicted value of a car purchased 10 years ago?

• $20,000

• $15,000

• $11,000 to $12,000

• $5,000

What does a trend line show in a data set?

• Only the lowest values

• The trend of data and the relationship between two variables

• The exact values of data points

• Only the highest values

Does a trend line always pass through the origin?

• Yes, it always does

• No, it never does

• It depends on the data set

• It may or may not pass through the origin

What does making predictions with a trend line involve?

• Connecting all data points

• Estimating beyond the given data

• Ignoring the trend line

• Using only the highest data points