Analyze Scatterplot and Line of Best Fit

Which relationship is shown by this scatter plot?

• As the cost goes down, the number sold goes

  down.

• As the cost goes up, the number sold goes

  down.

• As the cost does down, the number sold

  remains the same.

• There is no relationship between cost and the

  number sold.

Rohan, Isla, and Jackson are studying the relationship between the number of hours spent studying and the test scores of their classmates. What does a negative correlation in their scatterplot indicate?

• There is no relationship between the hours spent studying and test scores.

• As the number of hours spent studying increases, the test scores also increase.

• As the number of hours spent studying increases, the test scores decrease.

• As the number of hours spent studying decreases, the test scores also decrease.

What does a correlation coefficient close to -1 indicate in a scatterplot?

• No relationship

• Strong negative linear relationship

• Weak negative linear relationship

• Strong positive linear relationship

Jared collected data on the ages and heights of a random sample of elementary school students. If he plots the data on a scatter plot, what relationship will he most likely see between age and height?

• A negative correlation

• No correlation

• A positive correlation

• A constant correlation

Which graph represents a positive correlation?

• 
• 
• 
• 

Sophia and Abigail are working on a project to analyze the relationship between the number of hours spent studying and test scores. Which type of data visualization should they use to display this relationship?

• A scatterplot is a type of data visualization that displays the relationship between two categorical variables.

• A scatterplot is a type of data visualization that displays the relationship between a numerical variable and a categorical variable.

• A scatterplot is a type of data visualization that displays the relationship between two numerical variables using a line graph.

• A scatterplot is a type of data visualization that displays the relationship between two numerical variables.

What does a correlation coefficient of 0 indicate in a scatterplot?

• Perfect positive linear relationship

• Weak positive linear relationship

• No linear relationship

• Perfect negative linear relationship

What does the line of best fit represent in a scatterplot?

• The maximum value in the data

• The average of the data points

• The outlier points

• The trend in the data

How does sketching the line of best fit help in analyzing data in a scatterplot?

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What is the purpose of sketching the line of best fit in a scatterplot?

• To represent the trend in the data

• To make the data look neat

• To show the average of the data points

• To confuse the viewer