Question

Which describes the graph of the polynomial function
f(x) = (x – 2)(x – 4)(x + 1)?

A. It falls to the left and rises to the right.
B. It rises to the left and falls to the right.
C. It rises to the left and to the right.
D. It falls to the left and to the right.

Answer 1

Really need help guys :(

Answer 2

do you know what it would look if you sketched it out? :)

Answer 3

mmmm not really :(

Answer 4

okaay, well... immediately just by looking at your function, you should know that it is a "cubic" curve since there are three values for x... (like if you were to expand your brackets, you'd get x^3 )
\[f(x) = (x-2) ( x -4) ( x + 1) \]
So first step is to identify whether your cubic curve would be positive or negative.
So if you expanded the brackets, would you get \[x^3 or x ^{-3}\]

Answer 5

ahhhh ok i see now