Regression Lines and Correlation

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above

Which of the following lines represents the line of best fit for the scatter plot?

• A

• B

• C

• D

Which sentence describes the relationship shown on this scatter plot?

• As the temperature decreases, the visitors increase.

• As the temperature increases, the number of visitors increases.

• As the visitors increase, the temperature decreases.

• No correlation

As x increases, y increases

• correlation coefficient

• causation

• positive correlation

• negative correlation

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

• The correlation is weak.

• The correlation is strong.

• There is no correlation.

• The variables are independent.

What does the term "line of best fit" refer to in a scatter plot?

• A line that passes through all the data points.

• A line that minimises the distance of all points from the line.

• A line that maximises the distance of all points from the line.

• A line that is parallel to the x-axis.

• The y-intercept.

• The point where the line crosses the y-axis.

• The correlation coefficient.

In the context of bivariate data, what does the term "residual" refer to?

• The difference between the observed value and the predicted value.

• The slope of the regression line.

• The y-intercept of the regression line.

• The correlation coefficient.

Which of the following is the equation of a regression line?

A connection between two or more things

• Correlation

• Linear

• Trend Line

• Scatter Plot