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WorksheetsScatter plots and trend lines
Total questions: 45
Worksheet time: 3hrs 49mins
Name
Class
Date
1.
You are analyzing a scatter plot that has a negative correlation. What is true of the of the x and y values?
a)
As x increases, y decreases
b)
As x increases, y increases
c)
As x decreases, y decreases
2.
What type of correlation (association)?
The outside temperature and the amount of layers you wear.
The outside temperature and the amount of layers you wear.
a)
Positive correlation
b)
Negative correlation
c)
No correlation
d)
All of the above
3.
The number of siblings you have and your weight.
a)
Positive correlation
b)
Negative correlation
c)
No correlation
d)
All of the above
4.
The height of students and their scores on a test.
a)
positive correlation
b)
negative correlation
c)
no correlation
5.
The number of notebooks bought and the total cost.
a)
positive association
b)
negative association
c)
no association
6.
As the age of the car increases, its value decreases. Which scatterplot represents this relationship?
a)
A
b)
B
c)
C
d)
D
7.
What type of association does this scatter plot show?
a)
positive linear association
b)
negative linear association
c)
no association
d)
nonlinear association
8.
About how many male math teachers were there in 2006?
a)
15
b)
30
c)
35
d)
45
9.
Which of the following could be a possible line of best fit for the data?
a)
y = -5/2x + 20
b)
y = -x + 19
c)
y = x + 20
d)
y = 2/3x + 15
10.
What is a line of best fit used for?
a)
To make predictions
b)
To make the graph look pretty
c)
To connect the points
d)
To make it look like you know what you are doing
11.
What is a scatter plot?
a)
A graph that shows the relationship of two data sets.
b)
A graph drawn using rectangular bars to show how large each value is.
c)
A graph that shows information that is connected in some way.
d)
A graph that shows data changing over time.
12.
The graph above shows a line of best fit for data collected on the distance bicyclists have remaining in relation to the amount of time they have been riding. What is the equation of the line of best fit?
a)
y = -25x + 170
b)
y = 25x + 170
c)
y = -(5/8) x + 170
d)
y = (5/8) x + 170
13.
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°?
a)
8,300
b)
8
c)
7,300
d)
9,300
14.
Looking at the graph, what is the correlation between the x and y variables?
a)
y increases as x increases
b)
y is constant
c)
y decreases as x descreases
d)
y decreases as x increases
15.
A teacher made the following graph showing absences vs. final grades. Predict the grade of a student that has 7 absences.
a)
45
b)
50
c)
60
d)
70
16.
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?
a)
y = (3/2) x
b)
y = 30x
c)
y = 30x + 300
d)
y = (3/2)x + 300
17.
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?
a)
90
b)
180
c)
135
d)
150
18.
Looking at the graph showing a line of best fit, what is the correlation shown?
a)
Length of life is constant
b)
Length of life increases as amount of sunlight increases
c)
Length of life increases as amount of sunlight decreases
d)
Length of life decreases as amount of sunlight increases
19.
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.
a)
70
b)
90
c)
80
d)
60
20.
What is the type of correlation for the following scatter plot?
a)
Negative
b)
None
c)
Positive
21.
What type of correlation does this scatter plot have?
a)
positive
b)
negative
c)
none
d)
all of the above
22.
About how many male math teachers will there be in 2016?
a)
35
b)
46
c)
52
d)
70
23.
Based on this scatter plot, a student with 6 absences should get approximately what score on the final exam?
a)
≅ 58
b)
≅ 92
c)
≅ 100
d)
≅ 76
24.
Which of the following lines represents the line of best fit for the scatter plot?
a)
A
b)
B
c)
C
d)
D
25.
Which sentence describes the relationship shown on this scatter plot?
a)
As the temperature decreases, the visitors increase.
b)
As the temperature increases, the number of visitors increases.
c)
As the visitors increase, the temperature decreases.
d)
No correlation
26.
If a carpenter earned $1000, what is the best estimate for how many days he worked?
a)
3
b)
4
c)
5
d)
6
27.
Which of the following would be the most accurate equation for the scatter plot?
a)
y = -2x - 7
b)
y = -x + 7
c)
y = 3x + 7
d)
y = 25x + 7
28.
Choose the graph with a trend line that best fits the data.
a)
graph 1
b)
graph 2
c)
graph 3
d)
graph 4
29.
the slope is -5/7, what does that mean?
a)
gain 5 hour of sleep for 7 cups of coffee
b)
lose 5 hours of sleep for 7 cups of coffee
c)
lose 7 cups of coffee for 5 hours of sleep
d)
lose 5 cups of coffee for 7 hours of sleep
30.
Describe the correlation in the graph shown.
a)
Strong Negative
b)
Strong Positive
c)
Weak Negative
d)
Weak Positive
31.
The red line represents the line of best fit for the scatter plot. How many ice cream sales are expected if the temperature is 90°?
a)
55
b)
0
c)
103
d)
100
32.
identify the outlier
a)
30, 100
b)
100, 30
c)
there is no outlier
33.
Which best describes the form of this scatterplot?
a)
linear
b)
nonlinear
c)
scattered
34.
The following scatter plot shows Pam's training as she prepares to run a 6 mile race at the end of the month. Which of the following would be a reasonable approximation for the length of time it would take for her to run 6 miles?
a)
A. 50 min
b)
B. 80 min
c)
C. 45 min
d)
D. 60 min
35.
Make a prediction for a resting heart rate after 6 hours of exercise a week.
a)
6
b)
50
c)
55
d)
59
36.
Which scatter plot show a positive relationship?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
37.
Which scatter plot shows no relationship?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
38.
Which scatter plot shows a negative relationship?
a)
Graph A
b)
Graph B
c)
Graph C
d)
Graph D
39.
In the scatter plot, does the image shows a "Line of Best Fit"?
a)
Yes
b)
No
40.
The equation of the trend line
is y= 1/2x +1. Use the equation to determine the amount of time it would take to bike 20 laps.
*Look at the x and y axis first before starting the problem
is y= 1/2x +1. Use the equation to determine the amount of time it would take to bike 20 laps.
*Look at the x and y axis first before starting the problem
a)
38 minutes
b)
11 minutes
c)
41 minutes
d)
10 minutes
41.
In a scatterplot, a cluster...
a)
...is something we didn't learn in 8th grade
b)
...is a point on the origin
c)
...is a point that is far outside the main cluster of points/ordered pairs
d)
...is a group of points that are close together
42.
In a scatterplot, an outlier...
a)
...is something we didn't learn in 8th grade
b)
...is a point on the origin
c)
...is a point that is far outside the main cluster of points/ordered pairs
d)
...is a group of points that are close together
43.
The size of a dog and the amount of dog food needed
a)
Positive correlation
b)
Negative correlation
c)
No correlation
44.
The scatterplot below suggests which of the following types of data relationship?
a)
Weak, negative
b)
weak, positive
c)
strong, negative
d)
strong, positive
45.
Describe the correlation in the graph shown.
a)
Weak Negative
b)
Weak Positive
c)
Strong Negative
d)
Strong Positive
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