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 (min) (percent) y 60 72 70 74 80 76 90 78 100 80

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 (min) (percent) y 60 72 70 74 80 76 90 78 100 80

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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Question

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
0=0
X
Ś

Oo
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
(min)
(percent)
B
X
y
60
72
70
74
80
76
90
78
100
80
8

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Follow-up Question

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%
According to the linear model, Loraine would have to study at least
on her weekly examination.
×
Ś
This model (Choose one)
appropriate for other students.

Solution

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