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WorksheetsLines of Best Fit
Total questions: 37
Worksheet time: 8hrs 18mins
Name
Class
Date
1.
The number of siblings you have and your weight.
a)
Positive correlation
b)
Negative correlation
c)
No correlation
d)
All of the above
2.
Find the slope for the trend line using points (2,2) and (4,3)
a)
2
b)
1/2
c)
-2
d)
-1/2
3.
As the age of the car increases, its value decreases. Which scatterplot represents this relationship?
a)
A
b)
B
c)
C
d)
D
4.
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
5.
Students in a group of chess teams submitted data about hours of team practice and the number of matches the team won. The graph shows the results of the data. Based on the linear regressions equation y = 3.14x + 3.52, if a team practices 4.5 hours per week next year, which is the best prediction of the number of chess matches a team could expect to win?
a)
about 24
b)
about 12
c)
about 8
d)
about 18
6.
What type of association does this graph have?
a)
positive
b)
negative
c)
none
d)
all of the above
7.
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
8.
Based on the trend line, about how many guests should be expected if the temperature is around 80 degrees?
a)
8,300
b)
7,300
c)
8
d)
9,300
9.
Predict the grade of a student that has 7 absences.
a)
50
b)
45
c)
70
d)
60
10.
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
11.
These kind of observation use your senses to observe results.
a)
Qualitative
b)
Quantitative
c)
Scientific
12.
These kind of observations are made using instruments such as rulers, balances and thermometers.
a)
Qualitative
b)
Quantitative
c)
Scientific
13.
The temperature of the room is decreasing by 4 degrees Celsius.
a)
Qualitative
b)
Quantitative
14.
The clouds are grey and ground is wet.
a)
Qualitative
b)
Quantitative
15.
There are 25 liters of water in the buckets.
a)
quantitative
b)
qualitative
16.
From the graph, the association type is:
a)
Positive
b)
Negative
c)
None
d)
Nonlinear
17.
Predicting the number of days to finish when you read 40 pages is an example of:
a)
Interpolation
b)
Extrapolation
c)
An outlier
18.
What is the slope of the trend line?
a)
$1 per day
b)
$1 per week
c)
$20 per day
d)
$20 per week
19.
What is the y-intercept of the trend line?
a)
(0, 0)
b)
(0, 20)
c)
(0, 100)
20.
Write the equation of the trend line.
a)
y = 1x
b)
y = 1x + 100
c)
y = 20x
d)
y = 20x + 100
21.
From the graph, (1, 95) is an example of:
a)
Interpolation
b)
Extrapolation
c)
An outlier
22.
Predicting the band grade after 3.5 hours of practice is an example of:
a)
Interpolation
b)
Extrapolation
c)
An outlier
23.
What is the slope of the trend line?
a)
$0.50 per minute
b)
$0.10 per minute
c)
$1 per minute
d)
$10 per minute
24.
Write the equation of the trend line.
a)
y = 0.50x
b)
y = 0.50x + 30
c)
y = 0.10x + 30
d)
y = 10x + 30
25.
Predicting the attendance given a ticket price of $27.50 is an example of:
a)
Interpolation
b)
Extrapolation
c)
An outlier
26.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
d)
Compound
27.
What would the INDEPENDENT variable be in an experiment testing which types of paper airplane goes furthest?
a)
the paper used
b)
the type of paper airplane
c)
the distance of each plane's flight
d)
how hard the plane is thrown
28.
Research Question: Does the type of gasoline put in a car affect how fast the car can drive. What is the independent variable?
a)
Type of gasoline
b)
which car the gas is put into
c)
how fast the car can drive
d)
how much gas is put into the car
29.
a)
The dependent variable is total cost
b)
The dependent variable is weight
c)
The independent variable is total cost
d)
The independent variable is cost of a package
30.
On a graph, which axis shows the independent variable?
a)
x-axis
b)
y-axis
c)
neither
d)
it changes
31.
A(n) _____________ variable depends on or is changed by another variable.
a)
dependent
b)
independent
32.
Rich is a member of a gym. He pays a monthly fee plus a per-visit fee. The equation below represents the monthly amount Rich pays for his membership to the gym per month for x visits.
y=3x+10
What does the y-intercept of the graph of this equation represent?
y=3x+10
What does the y-intercept of the graph of this equation represent?
a)
The monthly fee
b)
How much Rich pays per visit
c)
The number of times Rich goes to the gym
d)
The total cost at the end of the month
33.
Which statement describes the trend in the scatter plot below?
a)
as PDSI increases, the temperature decreases
b)
as PDSI increases, the temperature increases
c)
no correlation between PDSI and temperature
d)
as PDSI decreases, the temperature decreases
34.
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
35.
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
36.
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
37.
What would the correlation between elevation and temperature?
a)
none
b)
cannot be determined
c)
positive correlation
d)
negative correlation
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