Let $z = x ^ { 2 } + y ^ { 2 }$

Multiple Choice

Let $z = x ^ { 2 } + y ^ { 2 }$ . Then the change of z from (1, 3) to (1.1, 3.2) approximated by $d ^ { z }$ is

A) 0.52
B) 0.74
C) 1.4
D) 1.27
E) 1.77