Math Exam
Authored by Chloe Moses
Mathematics
9th Grade
CCSS covered
Used 8+ times
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74 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The scatterplot shows the ages and finishing times of seven men who ran a charity 5k run. Which equation represents this linear model?
y = 0.47x + 7.72
y= 0.47x + 29.15
y = 2.146x - 27.57
2.146x - 2.07
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aaliyah, Julio, Dan, and Miriam are each studying sets of data. Aaliyah is working with 14 data pairs with a correlation coefficient of 0.9. Julio is working with 13 data pairs with a correlation coefficient of -0.8. Dan is working with 10 data pairs with a correlation coefficient of 0.1. Miriam is working with 15 data pairs with a correlation coefficient of -0.2. For which two data sets is a linear regression model reasonable?
Aaliyah's and Julio's data sets
Julio's and Miriam's data sets
Dan and Miriam's data sets
Miriam's and Aaliyah's data set
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which best describes the strength of the correlation, and what is true about the causation between the variables
3 18.8
4 25.1
6 37.7
9 56.5
It is a weak positive correlation, and it is not like causal
It is a weak positive correlation, and it is likely causal
It is a strong positive correlation, and it is not like causal
It is a strong positive correlation, and it is likely causal
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which is most likely the correlation coefficient for the set of data shown
-0.872
-0.191
0.191
0.872
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Maria gathered the data in the table. She finds the line of best fit to be y = 2.78x - 4.4.
What is the residual value when x = 4
1 -2
2 1.3
3 4.2
4 7.3
5 8.9
-6.72
-0.58
0.58
6.72
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does a residual value of 1.3 mean when referring to the line of best fit of a data set
a data point is 1.3 units above the line of best fit
A data point is 1.3 units below the line of best fit
The line of best fit has a slope of -1.3
The line of best fit has a slope of 1.3
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which table shows no correlation?
3 -1
5 -2
6 -3
8 -2
10 -5
14 -4
15 -8
3 -6
5 -7
6 -4
8 -2
10 0
14 -1
15 3
3 -2
5 -4
6 6
8 8
10 12
14 10
15 -16
3 -3
5 -5
6 -9
8 -11
10 -13
14 -15
15 -17
Tags
CCSS.5.G.A.2
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