Scatter Plots Trend Lines Association

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

A teacher made the following graph showing the number of hours that a student studied for an exam versus their exam grade. Predict the grade of a student if they studied for 3.5 hours.

• 70

• 90

• 80

• 60

As the age of the car increases, its value decreases. Which scatterplot represents this relationship?

• A

• B

• C

• D

About how many male math teachers were there in 2006?

• 15

• 30

• 35

• 45

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

• 45

• 50

• 60

• 70

Match the scatter plot to the equation that could represent the equation of its trend line.

• y = 3x

• y=4x-2

• y = -x + 5

• y = -5x

• The relationship is not linear

Match the scatter plot to the equation that could represent the equation of its trend line.

• y = 3x

• y=4x-2

• y = -x + 5

• y = -5x

• The relationship is not linear

Match the scatter plot to the equation that could represent the equation of its trend line.

• y = 3x

• y = x + 3

• y = -x + 5

• y = -5x

• The relationship is not linear