25 pts! Will make brainliest, could someone help me please? TwT

1 = the average of sleep hours would be - h

2 = the average of test scores would be - %

3 = the average of the product of sleep hours and test scores (h×%)

4 = the average of the square of sleep hours (h×h)

a) The equation of your best-fit (least-squared-error) line is then

 % = (a3 - (a1×a2))/(a4 - (a1)²)×(h - a1) + a2

In numbers, this is

 % = 6.33333h + 38.6875

b) In the  h = 8, the equation gives

 838.6875 + 6.33333×8  ≈ 89.4

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

2 x 503

step-by-step explanation:

its 1006