Scatter Plots and Correlation Relationships

David is analyzing the relationship between the number of hours studied and the scores obtained in a test. Which of the following equations could represent a line of best fit in his scatter plot?

Emma and Aiden are analyzing the relationship between the number of hours studied and test scores. What is the primary purpose of using a scatter plot in their analysis?

• To calculate the mean of a dataset

• To identify patterns or relationships between two variables

• To display categorical data

• To summarize data with a single number

Isla is analyzing the relationship between advertising spend and revenue for her business. Which of the following scenarios would be best visualized using a scatter plot?

• The monthly sales figures of a company

• The relationship between advertising spend and revenue

• The distribution of employee ages

• The breakdown of expenses in a budget

Lily and Arjun are analyzing the relationship between two stocks they are interested in. What might a scatter plot reveal about these stocks?

• The average price of each stock

• The correlation between the stock prices

• The total market capitalization

• The dividend yield of each stock

Abigail is studying the effect of sunlight on plant growth. Looking at the graph showing a line of best fit, what is the correlation shown?

• Length of life is constant

• Length of life increases as amount of sunlight increases

• Length of life increases as amount of sunlight decreases

• Length of life decreases as amount of sunlight increases

Avery is analyzing the relationship between the number of hours studied and test scores. What type of graph should Avery use?

• A graph that shows the relationship of two data sets.

• A graph drawn using rectangular bars to show how large each value is.

• A graph that shows information that is connected in some way.

• A graph that shows data changing over time.

Michael is analyzing the relationship between the number of hours he studies and his test scores. Which equation written in slope-intercept form represents the trend line shown on the scatter plot below?

What type of correlation is shown in this plot?

• Positive

• Negative

• No Correlation

What type of correlation is shown in this plot?

• Positive

• Negative

• No Correlation

What type of correlation does this graph have?

• positive

• negative

• none

• all of the above