Scatter Plots and Line of Best Fit Quiz

What is a scatter plot?

• A scatter plot is a type of plot that displays values for three variables as points on a Cartesian plane.

• A scatter plot is a type of plot or graph that displays values for two variables as points on a Cartesian plane.

• A scatter plot is a type of plot that displays values for two variables as lines on a Cartesian plane.

• A scatter plot is a type of plot that displays values for one variable as points on a Cartesian plane.

What does the line of best fit represent in a scatter plot?

• The average of the variables

• The minimum value of the variables

• The trend or relationship between the variables

• The maximum value of the variables

What does a positive correlation in a scatter plot indicate?

• The two variables are not related to each other.

• The two variables are inversely related to each other.

• The correlation is only applicable to one variable.

• The two variables are directly related to each other and increase or decrease together.

What does a negative correlation in a scatter plot indicate?

• There is no relationship between the variables.

• As one variable increases, the other variable decreases.

• The variables are not related to each other.

• As one variable increases, the other variable increases.

What does a correlation coefficient of 0 indicate?

• No linear relationship

• Weak positive linear relationship

• Perfect negative linear relationship

• Perfect positive linear relationship

What does a correlation coefficient of 1 indicate?

• Perfect positive linear relationship

• Perfect negative linear relationship

• No relationship between the variables

• Strong positive linear relationship

What does a correlation coefficient of -1 indicate?

• No relationship between the variables

• Perfect positive linear relationship

• Weak negative linear relationship

• Perfect negative linear relationship

What is the equation of a line of best fit?

• y = nx + m

• y = mx + b

• y = mx - b

• y = ax^2 + bx + c

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

• The color of the line

• The thickness of the line

• The distance between the two variables being analyzed

• The rate of change between the two variables being analyzed.

How is the strength of correlation determined in a scatter plot?

• By the degree of closeness of the plotted points to a straight line

• By the color of the plotted points

• By the size of the plotted points

• By the shape of the plotted points