Scatterplots and Trend Lines Review

The scatter plot shows climate data for 10 cities on a certain day. Use the scatter plot to identify which of these statements is false. 

• The temperature was at least 22 degrees in 4 cities

• Two cities got exactly 10 mm of rain

• None of the cities got more than 20 mm of rain

• None of the statements are false

The scatterplot shows the temp, in degrees, outside a house every hour for 10 hours.

Estimate the temp after 13 hours using the equation.

• 57.5

• 55

• 30

• -10

Mr. Thomas wanted to know if the amount of class time that he gave students to study affected their test scores. The scatterplot shows the results. What kind of relationship between class study time and test scores is shown on the scatter plot?

• No correlation

• Positive then negative correlation

• Positive correlation

• Negative correlation

A group of friends recorded the time it took to ride their bikes around the park. The scatterplot shows their results with the line of best fit.

Using the line of best fit, which is closer to the number of minutes it would take to complete 9 laps?

• 4

• 5

• 6

• 7

Oren plants a new vegetable garden each year for 14 years. The scatterplot shows the relationship between the number of seeds he plants and the number of plants that grow. Which number best represents the slope of the line of best fit through the data?

• -10

• -1/10

• 1/10

• 10

The scatterplot shows the relationship between the length of a long-distance phone call and the cost of the phone call.

Based on the line of best fit for the scatterplot, which of the following amounts is closest to the cost of a 120 minute phone call?

• $10

• $12

• $15

• $20

The scatterplot shows the average traffic volume and average vehicle speed on a certain freeway for 50 days in 1999.

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 at first, then decreases.

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

• As traffic volume increases, vehicle speed decreases.

• As traffic volume increases, vehicle speed increases.

Mrs. Ochoa recorded the age and show size of each student in her physical education class. The graph shows her data.

Which of the following statements about the graph is true?

• 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?

• 
• 
• 
• 

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

• There were 50 tickets issued every week.

• More ticket writers results in fewer tickets issued.

• More ticket writers results in more tickets issued.

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