1) Which quadratic regression equation models the following data points? (1, 6), (3, 8), (7,0)
a. f(x) = -0.5x2 + 3x + 3.5
c. f(x) = 0.5x2 + 3x + 3.5
b. f(x) = -0.5(x − 3)(x – 3.5)
d. f(x) = -0.5(x + 3)(x +3.5)

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option

positive

step-by-step explanation:

the quadrant is facing upwards

yes the data was not prsented

step-by-step explanation:

let's call the solutions x₁ = (5 - 2√7)/3 and x₂ = (5 + 2√7)/3

then the equation is (x-x₁)(x-x₂) = 0

if you fill that in you get a lot of numbers which you can recognize as ax²+bx+c=0.

step-by-step explanation:

you can see that a=1 (there is just an x²)

b = (-5 -2√7 + 2√7 - 5)/3 = -10/3

c = -2√7)/3 ) * (-5+2√7)/3) = -1/3

so your answer is 3x^2 – 10x – 1 = 0