Scatter Plots Word Problems

A small theme park is trying to determine the number of guests they should expect on a weekend, based on the temperature outside.  Based on the trend line, about how many guests should be expected if the temperature is around 80°?

• 8,300
• 8
• 7,300
• 9,300

A group of students did an experiment to see how drinking cups of coffee right before bed affected sleep.  The results are shown below in the scatter plot with a line of best fit.  Use the given line of best fit to approximate the rate of change relative to the scatter plot.

• (7/5) hours/cup
• (5/7) hours/cup
• - (7/5) hours/cup
• - (5/7) hours/cup

The graph  shows a line of best fit for the data collected on the amount of cell phone bills in relation to the number of minutes used.  What is the equation of the line of best fit.

• y = (1/2) x + 3
• y = (1/2) x + 15
• y = (1/40) x 
• y = (1/40) x + 15

Looking at the graph, what is the correlation between the x and y variables?

• y increases as x increases
• y is constant
• y decreases as x descreases
• y decreases as x increases

A teacher made the following graph showing absences vs. final grades.  Predict the grade of a student that has 7 absences.

• 45
• 50
• 60
• 70

Which scatterplot most likely has a line of best fit represented by y = - 2x + 1

• W
• X
• Y
• Z

The graph shows a line of best fit for data collected on the amount of income earned by lawn companies in relation to the number of yards mowed.  What is the equation of the line of best fit?

• y = (3/2) x
• y = 30x
• y = 30x + 300
• y = (3/2)x + 300

The graph shows a line of best fit for data collected on the value of used cards in relation to the number of  years since they were purchased.  What is the equation of the line of best fit?

• y = 750 x + 9500
• y = - 750 x +11000
• y = (3/4) x + 11
• y = - (3/4) x + 11000

Mrs. Moises, the school counselor, keeps a candy jar in her office for students.  During one week, she kept count of how many students came to visit her and the number of candies in the jar, as show in the scatter plot.  Based on the trend line, what is the best prediction for the number of candies in the jar when 30 students visit her?

• 90
• 180
• 135
• 150

Looking at the graph showing a line of best fit, what is the correlation shown?

• Length of life is constant
• Length of life increases as amount of sunlight increases
• Length of life increases as amount of sunlight decreases
• Length of life decreases as amount of sunlight increases