A sample of n = 11 U. S. males, age 18-24 years, are measured for height and weight. Let x denote the height in inches, and let y denote
the weight in pounds. The summary data are
Σ = 761, Σ y = 1761, Σα? = 52729, Σy? = 286273, Σαμ = 122234
From these we calculate
Sex = 81.636, Syy = 4352.9, Szy = 394.8

Find the regression line y= bo + b1 a.
(Note: normally we would put a circumflex over the y: that is, "y-hat,"
but that notation is not available in the standard math editor.)
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or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5

step-by-step explanation:

left be aligning the decimal points is required to not required see the number of digits to the right