Exploring 3-5 Trend Lines

The video tutorial explains how to analyze scatter plots using trend lines, also known as lines of best fit. It covers identifying outliers and clusters, drawing trend lines, and using them to make predictions. The tutorial also discusses interpreting graph equations, understanding negative correlations, and analyzing relationships between variables, such as sleep and coffee consumption.

What is another name for a trend line?

• Line of best fit

• Data cluster

• Outlier

• Scatter plot

Tags

CCSS.8.SP.A.2

What should you do with outliers when drawing a line of best fit?

• Include them in the line

• Ignore them

• Move them closer to the line

• Highlight them

Tags

CCSS.8.SP.A.2

When drawing a line of best fit, how should the data points be distributed?

• Randomly scattered

• Equally above and below the line

• All below the line

• All above the line

Tags

CCSS.8.EE.B.5

What format should be used when titling a graph?

• X versus Y

• Dependent versus Independent

• Independent versus Dependent

• Y versus X

In the equation y = 20x, what does 'x' represent in the context of the given example?

• Miles

• Gallons of gas

• Time

• Power

Tags

CCSS.HSF.LE.B.5

What is the y-intercept in the context of the microwave cooking time example?

• The highest point on the trend line

• The point where the trend line intersects the y-axis

• The point where the trend line intersects the x-axis

• The lowest point on the trend line

Tags

CCSS.HSF.LE.B.5

What does a negative correlation indicate in a scatter plot?

• Both variables increase

• No relationship between variables

• Both variables decrease

• One variable increases while the other decreases

Tags

CCSS.HSS.ID.B.5

What are the two variables being analyzed in the sleep and coffee consumption scatter plot?

• Miles and gallons of gas

• Cook time and power

• Outliers and clusters

• Hours of sleep and cups of coffee

Tags

CCSS.8.SP.A.1

What is the effect of increasing coffee consumption on sleep according to the trend line?

• Increases and then decreases sleep

• No effect on sleep

• Decreases sleep

• Increases sleep

What is the best method to determine the slope of a trend line?

• Choose the first and last points

• Choose two random points

• Choose two points that cross at grid line intersections

• Choose the highest and lowest points

Tags

CCSS.8.EE.B.5