A company estimates its total profit to be modeled by the function p(x) = x3 - 4x2 - 1, where p is in hundreds of dollars and x is the number of years elapsed since the start-up year. Do you expect that the company will break even?

true statements:

a) x + y = y + x   ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

false statements:

c) x - y = y - x   should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)

step-by-step explanation:

a. the residual plot for model 1 has a random pattern and is a good fit for the data.