Reading Scatter Plots

Which statement best describes the relationship between average traffic volume and average vehicle speed shown on the scatter plot?

• 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.

Mr. Thomas wanted to know if the amount of class time given to students affected their test scores. What kind of relationship between class study time and test scores is show on the scatter plot?

• No correlation

• Positive correlation

• Negative correlation

The scatter plot shows the number of absences in a week for classes of different sizes of classes. Trevor concluded that there is a positive correlation between class size and the number absences. 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

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

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

The scatter plot could show the relationship between which two variables?

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

• Outside air temperature (x) vs. air conditioning cost (y)

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

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

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

• The outside temperature an 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

• A students height and grade point average

Determine if the data set has a positive, negative, or no correlation.

The number of siblings a student has and their grade in math class.

• Positive correlation

• Negative correlation.

• No correlation

Determine if the following data set has a positive, negative, or no correlation.

The age of the car and the value of the car. (Note, the car we are considering is not rare or a sought after car)

• Positive correlation

• Negative correlation

• No correlation

Determine if the data set would have a positive, negative, or no correlation.

The number of hours a person has driven and the number of miles driven.

• Positive correlation

• Negative correlation

• No correlation

Based on the graph, which variable is independent and which is dependent?

• Average traffic volume is the independent variable measured and the average vehicle speed is the dependent variable.

• Average traffic volume is the dependent variable measured and the average vehicle speed is the independent variable.

• I am not sure what this means.

Which curve would best fit the data presented in the scatter plot?

• Linear

• Quadratic

• Exponential

• Power