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Just need help with part 4, thank you!

Just need help with part 4, thank you!

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Just need help with part 4, thank you!
Loraine is enrolled in an algebra class that meets 5 days per week. Her instructor gives a test every Friday. Loraine has a study plan and keeps a portfolio with notes, homework, test corrections, and vocabulary. She also records the amount of time per day that she studies and does homework. The following data represent the amount of time she studied per day and her weekly test grades. Time Studied per Day Weekly Test Grade (percent) (min) 60 80 70 82 80 84 90 86 100 88 Part 1 of 5 (a) Graph the points on a rectangular coordinate system. Do the data points appear to follow a linear trend? 100 90- 20 10. 40 Minutes Part 2 of 5 The data points appear to follow a linear trend. Part 3 of 5 (b) Find a linear equation that relates Loraine's weekly test score y to the amount of time she studies per day r. Express numbers in exact simplest form. Test Score (%)
Transcribed Image Text:Loraine is enrolled in an algebra class that meets 5 days per week. Her instructor gives a test every Friday. Loraine has a study plan and keeps a portfolio with notes, homework, test corrections, and vocabulary. She also records the amount of time per day that she studies and does homework. The following data represent the amount of time she studied per day and her weekly test grades. Time Studied per Day Weekly Test Grade (percent) (min) 60 80 70 82 80 84 90 86 100 88 Part 1 of 5 (a) Graph the points on a rectangular coordinate system. Do the data points appear to follow a linear trend? 100 90- 20 10. 40 Minutes Part 2 of 5 The data points appear to follow a linear trend. Part 3 of 5 (b) Find a linear equation that relates Loraine's weekly test score y to the amount of time she studies per day r. Express numbers in exact simplest form. Test Score (%)
20 20 30 Minutes Part 2 of 5 The data points appear to follow a linear trend. Part 3 of 5 (b) Find a linear equation that relates Loraine's weekly test score y to the amount of time she studies per day x. Express numbers in exact simplest form. (Hint: Pick two ordered pairs from the observed data and find an equation of the line through the points.) The linear equation in slope-intercept form (y= mx+b) is y = 68 + 0.2x Part: 3/5 Part 4 of 5 (c) How many minutes should Loraine study per day in order to score at least 90% on her weekly examination? Would the equation used to determine the time Loraine needs to study to get 90% work for other students? Why or why not? minutes per day in order to receive at least 90% on According to the linear model, Loraine would have to study at least her weekly examination. This model (Choose one) v appropriate for other students. Test Score
Transcribed Image Text:20 20 30 Minutes Part 2 of 5 The data points appear to follow a linear trend. Part 3 of 5 (b) Find a linear equation that relates Loraine's weekly test score y to the amount of time she studies per day x. Express numbers in exact simplest form. (Hint: Pick two ordered pairs from the observed data and find an equation of the line through the points.) The linear equation in slope-intercept form (y= mx+b) is y = 68 + 0.2x Part: 3/5 Part 4 of 5 (c) How many minutes should Loraine study per day in order to score at least 90% on her weekly examination? Would the equation used to determine the time Loraine needs to study to get 90% work for other students? Why or why not? minutes per day in order to receive at least 90% on According to the linear model, Loraine would have to study at least her weekly examination. This model (Choose one) v appropriate for other students. Test Score
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