Scatter plots,correlation,lines of best fit

Multiple Choice

What is the significance of using scatter plots in analyzing data between two variables?

• They help visualize relationships and trends between variables.

• They are used to display single variable data only.

• They are only useful for categorical data.

• They are primarily used for calculating averages.

Multiple Choice

Which type of association is shown when both variables increase together in a scatter plot?

• Positive association

• Negative association

• No association

• Inverse association

Multiple Choice

What type of association does the graph between Driver Age and Sign Legibility Distance show?

• Negative association

• Positive association

• No association

• Non-linear association

Multiple Select

Which of the following statements are true about linear and non-linear scatter plots?

• A linear scatter plot shows points forming a straight line.

• A non-linear scatter plot can show a curve.

• All scatter plots are perfectly linear.

• Non-linear scatter plots do not follow a straight line.

Multiple Choice

Which scatter plot shows a linear relationship between x and y?

• A

• B

• C

• D

Fill in the Blank

A group of data points that are closely grouped together in a scatter plot is called a ___.

Multiple Choice

Which of the following is NOT a purpose of a line of best fit?

• To follow the trend of the data

• To split the data in half

• To estimate or predict values not given in the set

• To connect all data points exactly

Multiple Choice

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

• A

• B

• C

• D

Multiple Choice

Which scatter plot shows both positive and linear association?

• Blue

• Teal

• Orange

• Pink

Fill in the Blank

The scatter plot shows the relationship between the number of chapters and the total number of pages for several books. Use the trend line to predict how many chapters would be in a book with 180 pages.

Open Ended

About how many points would we expect if Vasu played 40 minutes?

Fill in the Blank

What is the equation for the line of best fit for the crime data?

=

-

.

+

.

(

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Multiple Choice

Which of the following best describes the trend shown in the scatterplot of crime data over 10 years?

• The number of crimes increases each year.

• The number of crimes decreases each year.

• There is no clear trend in the data.

• The number of crimes stays the same each year.

Open Ended

What does the correlation coefficient tell you about the number of years passing and the number of crimes being committed in the area?

Multiple Choice

Which of the following statements is true based on the profit data for the company?

• Profit increases as the cost increases.

• Profit decreases as the cost increases.

• Profit remains constant as the cost increases.

• Profit first increases then decreases as the cost increases.

Open Ended

What does the correlation coefficient tell you about the cost of the product and the profit?

Multiple Choice

What is the main purpose of using a scatter plot?

• To show the relationship between two variables

• To display a single variable over time

• To compare categories of data

• To show parts of a whole

Open Ended

Use the line of best fit to determine the approximate IQ of a student who spends about 2 hours watching TV per week. What steps would you take to find this value?

Open Ended

What does the correlation coefficient tell you about the relationship between the number of hours each student watches TV per week and their IQ?