A 2-column table with 8 rows. The first column is labeled t with entries negative 4, negative 3, negative 2, negative 1, 0, 1, 2, 3. The second column is labeled f of x with entries negative 54, negative 20, negative 4, 0, negative 2, negative 4, 0, 16.
Using only the values given in the table for the function, f(x) = x3 β 3x β 2, what is the interval of x-values over which the function is decreasing?
(β4, 1)
(β4, β1)
(β1,1)
(β1, 2)