Given the relation y = 3x2 + 1, if the input is 4, what is the output?

Question

a: 13

b: 48

c: 49

d: 145

Answer 1

y(4) = 3*4^2 + 1

Answer 2

y = 3(4)^2 + 1
= 3(16) + 1
= ....