4. From the choices, which polynomial function, in factored form, represents the
given graph?
a.y = (x + 2)(x + 1)(x - 1)
b.y = (x + 1)(x - 1)(x - 2)
c.y = x(x + 2)(x + 1)(x - 1)
d.y= x(x + 1)(x - 1)(x - 2)
