If f(x) = 2x^2 + y, and f(2) = 20, what is the value of f(5)?  Choices: A) 104 B) 60 C) 62 D) 50 E) 25

Rationale: "f ( x ) = 2 x ^ 2 + y f ( 2 ) = 20 = > 2 * ( 2 ) ^ 2 + y = 20 = > 8 + y = 20 = > y = 12 f ( 5 ) = 2 * ( 5 ) ^ 2 + 12 = 62 answer c"
Answer: C