Use quadratic regression to find a function that fits the following
points.
(1,-8), (2,-4), (3,6)
y = [? ]x2 + 2x + [ ]

URGENT PLEASE HELP

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b

add them

step-by-step explanation:

idk you did not give the options or numbers so you cant solve it