Determine The Least Square Equation


The accompanying data were compiled by the superintendent of schools in a large metropolitan area. The table shows the average SAT verbal scores of high school seniors during the 5 years since the district implemented its “back-to-basics” program.

Year x                     1       2        3       4       5       
Average Score y    430    432    430    426    426    

Determine the equation of the least-squares line for these data.

a. y = –8/5x  + 433
b. y = –7/5x  + 428
c. y = 8/5x  + 428
d. y = 8/5x  + 433
e. y = –7/5x  + 433


The question belongs to Mathematics and it is about finding least squares equation for the data.

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