Consider the relation between hours of study and quiz grade for three different students. (i) Student 1 did not spend any time and received 5 in the quiz. P = (0, 5) (ii) Student 2 spent an hour studying and received 5 in the quiz. P2 = (1,5) (iii) Student 3 spent two hours studying and received 8 in the quiz. P3 = (2,8). We want to find a linear relation between hours of study and grade of the quiz y = mx + q where m and q ar unknowns, æ represents the hours studied for the quiz and y the quiz grade. (4a, ) Show that there is no line y = mx + q that passes through P1 , P2 and P3 using an inconsister system of equations. Hint: Substitute the y and y values of P. P. P. in the line eguation and show that the 3x2 svstem with unkn

Algebra and Trigonometry (6th Edition)
6th Edition
ISBN:9780134463216
Author:Robert F. Blitzer
Publisher:Robert F. Blitzer
ChapterP: Prerequisites: Fundamental Concepts Of Algebra
Section: Chapter Questions
Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...
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Consider the relation between hours of study and quiz grade for three different students.
(i) Student 1 did not spend any time and received 5 in the quiz. P = (0,5)
(ii) Student 2 spent an hour studying and received 5 in the quiz. P, = (1,5)
(iii) Student 3 spent two hours studying and received 8 in the quiz. P3 = (2,8).
We want to find a linear relation between hours of study and grade of the quiz Y = mx + q where m and q are our
unknowns, x represents the hours studied for the quiz and y the quiz grade.
(4a,
) Show that there is no line y = mx + q that passes through P1 , P2 and P3 using an inconsistent
system of equations.
Hint: Substitute the x and y values of P1, P2, P3 in the line equation and show that the 3x2 system with unknowns
m and q has no solutions.
(4b,
) Write the system of equations for part a) in matrix form AE = b where = (m, q)" .
(4c,
) Compute (AT A)-1
Transcribed Image Text:Consider the relation between hours of study and quiz grade for three different students. (i) Student 1 did not spend any time and received 5 in the quiz. P = (0,5) (ii) Student 2 spent an hour studying and received 5 in the quiz. P, = (1,5) (iii) Student 3 spent two hours studying and received 8 in the quiz. P3 = (2,8). We want to find a linear relation between hours of study and grade of the quiz Y = mx + q where m and q are our unknowns, x represents the hours studied for the quiz and y the quiz grade. (4a, ) Show that there is no line y = mx + q that passes through P1 , P2 and P3 using an inconsistent system of equations. Hint: Substitute the x and y values of P1, P2, P3 in the line equation and show that the 3x2 system with unknowns m and q has no solutions. (4b, ) Write the system of equations for part a) in matrix form AE = b where = (m, q)" . (4c, ) Compute (AT A)-1
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