Screen Mark Screen Mark Time (%) Time (%) Option 1 (hrs) (hrs) 2 85 3.5 75 20 students were surveyed and asked asked how many hours they spent on a screen the day before a test. The table summarizes the results. 4 60 81 0.5 85 1 78 70 5.5 62 (a) Croate a scatterplot using Desmos. Include this graph in your final solution. 1.5 74 1 89 (b) Describe the trend. 2 89 81 (c) Describe the relationship. 84 90 (d) Use Desmos to help you determine the line of best fit and the equation. 73 2.5 77 (e) What does the r value/r² value tell you? 1 95 1 89 (1) Use the equation to algebraically predict the test mark for a student who spends 7 2.5 76 4. 55 hours on a screen before a test. Use your graph to verify your solution.
Screen Mark Screen Mark Time (%) Time (%) Option 1 (hrs) (hrs) 2 85 3.5 75 20 students were surveyed and asked asked how many hours they spent on a screen the day before a test. The table summarizes the results. 4 60 81 0.5 85 1 78 70 5.5 62 (a) Croate a scatterplot using Desmos. Include this graph in your final solution. 1.5 74 1 89 (b) Describe the trend. 2 89 81 (c) Describe the relationship. 84 90 (d) Use Desmos to help you determine the line of best fit and the equation. 73 2.5 77 (e) What does the r value/r² value tell you? 1 95 1 89 (1) Use the equation to algebraically predict the test mark for a student who spends 7 2.5 76 4. 55 hours on a screen before a test. Use your graph to verify your solution.
Big Ideas Math A Bridge To Success Algebra 1: Student Edition 2015
1st Edition
ISBN:9781680331141
Author:HOUGHTON MIFFLIN HARCOURT
Publisher:HOUGHTON MIFFLIN HARCOURT
Chapter4: Writing Linear Equations
Section4.5: Analyzing Lines Of Fit
Problem 30E
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Question
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Transcribed Image Text:Two Variable Statistics
Screen
Mark
Screen
Mark
Time
(%)
Time
(%)
Option 10
(hrs)
(hrs)
85
3.5
75
20 students were surveyed and asked asked how many
hours they spent on a screen the day before a test. The table
summarizes the results.
4
60
3
81
0.5
85
1
78
70
5.5
62
(a) Create a scatterplot using Desmos. Include this graph in your final solution.
1.5
74
1
89
(b) Describe the trend.
2
89
81
(c) Describe the relationship.
84
90
(d) Use Desmos to help you determine the line of best fit and the equation.
73
2.5
77
(e)
What does the r value/r value tell you?
1
95
1
89
(f)
Use the equation to algebraically predict the test mark for a student who spends 7
2.5
76
4.
55
hours on a screen before a test. Use your graph to verify your solution.
3.
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