Scatter Plot & Line of Best Fit

• As traffic volume increases, vehicle speed increases.

• As traffic volume increases, vehicle speed decreases.

• As traffic volume increases, vehicle speed increases at first, then decreases.

• As traffic volume increases, vehicle speed decreases at first, then increases.

• The graph shows a positive trend.

• The graph shows a negative trend.

• The graph shows a constant trend.

• The graph shows no trend.

Which graph best shows a positive correlation between the number of hours studied and the test scores?

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The police department tracked the number of

ticket writers and number of tickets issued for the past 8 weeks. The scatter plot shows the results. Based on the scatter plot, which statement is true?

• More ticket writers results in fewer tickets issued.

• There were 50 tickets issued every week.

• When there are 10 ticket writers, there will be 800 tickets issued.

• More ticket writers results in more tickets issued.

A 5th grade class conducted a 5-minute experiment that involved heating time and water temperature. The results of the experiment are represented in the line graph above.

• The water temperature decreases as the

  heating time continues.

• A pattern cannot be determined between these measurements.

• The water temperature increases as the heating time continues.

• The water temperature remains the same as the heating time continues.

Which statement accurately describes the information in the scatter plot?

• The information shows a positive correlation. The weight of a dinosaur tends to increase according to its length.

• The information shows a negative correlation. The weight of a dinosaur tends to decrease according to its length.

• The information shows no correlation. The weight and length vary according to the type of dinosaur.

• The information shows no correlation. The relationship between the weight and length of a dinosaur is uncertain.

Which data will most likely show a negative correlation when graphed on a scatterplot?

• the outside temperature and the number of people wearing gloves.

• the distance a student lives from school and the amount of time it takes to get to school

• the number of visitors at an amusement park and the length of the lines for the rides

• the outside temperature and amount of people going to the beach

Which statement best describes why Trevor's conclusion was incorrect?

• The largest class does not have the most absences.

• The smallest class does not have the least number of absences.

• The data show no relationship between class size and number of absences.

• The data show a negative relationship between class size and number of absences.

• speed of an airplane (x) vs. distance traveled in one hour (y)

• outside air temperature (x) vs. air conditioning costs (y)

• distance traveled (x) vs. gas remaining in the tank (y)

• age of an adult (x) vs. height of an adult (y)