Consider the quadratic function q(x)=x2+4x+1. Exactly one of the following pairs (domain,q−1(y)) correctly gives a domain on which q is one–to–one together with the corresponding inverse. Identify it.
a) [−2,∞),q−1(y)=−2−y+3
b) (−∞,−2],q−1(y)=−2+y+3
c) [−2,∞),q−1(y)=−2+y+3
d) [2,∞),q−1(y)=−2+y+3