Predicting with Slope: Scatterplots in Everyday Life

A scatterplot shows the relationship between hours studied and test scores for 10 students. If the slope of the line of best fit is 5, what does this indicate about the relationship between hours studied and test scores?

• The slope of 5 indicates that each additional hour studied increases test scores by 5 points.

• A slope of 5 indicates no relationship between hours studied and test scores.

• The slope of 5 suggests that test scores increase by 10 points for every hour studied.

• The slope of 5 means that test scores decrease by 5 points for each hour studied.

Using the same scatterplot, if a student studies for 4 hours, what would you predict their test score to be based on the line of best fit?

• The predicted test score for studying 4 hours is approximately 90.

• The predicted test score for studying 4 hours is approximately 50.

• Based on the line of best fit, the predicted test score for studying 4 hours is approximately 75.

• The predicted test score for studying 4 hours is approximately 60.

A scatterplot displays the number of hours worked and the amount of money earned by a group of employees. If the slope of the line is 15, how much money does an employee earn per hour?

• 10 dollars per hour

• 25 dollars per hour

• 15 dollars per hour

• 20 dollars per hour

If an employee worked 10 hours, what would you predict their earnings to be based on the scatterplot?

• $300

• $200

• $150

• $100

A scatterplot shows the relationship between the temperature in degrees Fahrenheit and the number of ice cream cones sold. If the slope of the line is 3, what does this tell you about ice cream sales as temperature increases?

• As temperature increases, ice cream sales decrease.

• There is no relationship between temperature and ice cream sales.

• Ice cream sales remain constant regardless of temperature.

• As temperature increases, ice cream sales increase.

If the temperature reaches 80 degrees Fahrenheit, how many ice cream cones would you predict to be sold if the line of best fit indicates a starting point of 20 cones sold at 60 degrees?

• 25 cones

• 40 cones

• 30 cones

• 35 cones

A scatterplot illustrates the correlation between the number of books read and the average time spent reading per week. If the slope is 2, how many additional books does a student read for each extra hour spent reading?

• 3

• 2

• 1

• 4

If a student reads for 5 hours a week, how many books would you predict they read based on the scatterplot?

• 5 books

• Approximately 2 books

• 3 books

• 1 book

A scatterplot shows the relationship between the distance traveled and the amount of gas used in a car. If the slope of the line is 0.05, what does this indicate about the car's fuel efficiency?

• The slope indicates the car is inefficient, using 20 units of gas for every unit of distance.

• The car uses 0.05 units of gas for every 100 miles traveled.

• The car's fuel efficiency is poor, using 0.05 units of gas per unit of distance.

• The car's fuel efficiency is good, using 0.05 units of gas per unit of distance.

If a car travels 200 miles, how much gas would you predict it uses based on the slope of the scatterplot?

• 12 gallons

• 5 gallons

• 15 gallons

• 8 gallons