Line of Best Fit CW

What is a scatter plot? #1

• A scatter plot is a type of plot or mathematical diagram using Cartesian coordinates to display values for typically two variables for a set of data points.

• A scatter plot is a type of plot that displays values for only one variable.

• A scatter plot is a type of plot that uses polar coordinates instead of Cartesian coordinates.

• A scatter plot is a type of plot that is used to display categorical data.

Tags

CCSS.8.SP.A.1

What is the purpose of a scatter plot? #2

• To display the trend of a single variable over time.

• To show the distribution of a single variable.

• To compare the means of two groups.

• To display the relationship between two variables.

Tags

CCSS.8.SP.A.1

How is a scatter plot different from other types of graphs? #3

• It displays the relationship between two variables through the use of dots or points on a graph.

• It shows the relationship between three variables instead of two.

• It is only used for qualitative data instead of quantitative data.

• It uses lines instead of dots or points.

Tags

CCSS.8.SP.A.1

What is the line of best fit? #4

• A curved line that represents the best approximation of the relationship between two variables in a scatter plot.

• A line that represents the average of all the data points in a scatter plot.

• A straight line that represents the best approximation of the relationship between two variables in a scatter plot.

• A line that connects all the data points in a scatter plot.

Tags

CCSS.8.SP.A.2

How is the line of best fit determined? #5

• By minimizing the sum of squared differences using least squares regression.

• By drawing a straight line through the scatter plot without considering the data points.

• By randomly selecting points on the scatter plot.

• By maximizing the sum of squared differences using least squares regression.

Tags

CCSS.8.SP.A.2

What does the slope of the line of best fit represent? #6

• Y-intercept

• Standard deviation

• Rate of change

• Intercept

Tags

CCSS.8.EE.B.5

What does the y-intercept of the line of best fit represent? #7

• The average of the dependent variable

• Value of the dependent variable when the independent variable is zero.

• The slope of the line

• The value of the independent variable when the dependent variable is zero

Tags

CCSS.HSF.LE.B.5

How can you determine if a scatter plot has a positive correlation? #8

• Check if the points on the plot generally decrease from left to right.

• Check if the points on the plot are randomly scattered.

• Check if the points on the plot form a straight horizontal line.

• Check if the points on the plot generally increase from left to right.

Tags

CCSS.HSS.ID.B.5

How can you determine if a scatter plot has a negative correlation? #9

• Observe if the points on the plot tend to move in an upward direction from left to right.

• Observe if the points on the plot tend to move in a horizontal direction.

• Observe if the points on the plot tend to move in a downward direction from left to right.

• Observe if the points on the plot tend to move in a random direction.

Tags

CCSS.HSS.ID.B.5

What does it mean if a scatter plot has no correlation? #10

• Perfect negative correlation

• Random correlation

• No relationship or pattern

• Perfect positive correlation

Tags

CCSS.HSS.ID.B.5