A certain standardized test measures students' knowledge in English and math. The English and math scores for 10 randomly selected students are given in the table.
450
470
510
520
540
570
590
620
670
680
English (x)
Math (y)
490
480
500
580
550
540
610
590
620
650
Using technology, what is the equation for the least-squares regression line?
y = 180.2 + 0.68x
O ý = 0.68 + 180.2x
y = -124.1 + 1.22x
Oỹ = 1.22-124.1x

Which representation has a constant of variation of -2.5

Aphrase is shown read the phrase and give me the answer

Given the system of equations presented here: 2x + 4y = 14 4x + y = 20 which of the following actions creates an equivalent system such that, when combined with the other equation, one of the variables is eliminated? multiply the second equation by â’4 to get â’16x â’ 4y = â’80 multiply the second equation by â’1 to get â’4x â’ y = â’20 multiply the first equation by 2 to get 4x + 8y = 28 multiply the first equation by â’1 to get â’2x â’ 4y = â’14