Question

Which of the following polynomials has a graph with even symmetry?

a. 8x^6 - 6x^4 + 4x

b. 9x^7 - 4x^6 + 18x^2 - 7

c. 7x^4 + 9x^2 - 12

d. 8x^3 + 12x + 6

Answer 1

A polynomial with no odd-degree terms will have a graph with even symmetry. The one here that qualifies is ...
  c. 7x^4 +9x^2 -12