sat suite question viewer
| x | p(x) |
The table above gives selected values of a polynomial function p. Based on the values in the table, which of the following must be a factor of p ?
Explanation
Choice D is correct. According to the table, when x is or 2,
. Therefore, two x-intercepts of the graph of p are
and
. Since
and
are x-intercepts, it follows that
and
are factors of the polynomial equation. This is because when
, the value of
is 0. Similarly, when
, the value of
is 0. Therefore, the product
is a factor of the polynomial function p.
Choice A is incorrect. The factor corresponds to an x-intercept of
, which isn’t present in the table. Choice B is incorrect. The factor
corresponds to an x-intercept of
, which isn’t present in the table. Choice C is incorrect. The factors
and
correspond to x-intercepts
and
, respectively, which aren’t present in the table.