Ambrose Has Indifference Curves with the Equation X₂ = Constant

Ambrose has indifference curves with the equation x₂ = constant - 4x^1/2₁, where larger constants correspond to higher indifference curves.If good 1 is drawn on the horizontal axis and good 2 on the vertical axis, what is the slope of Ambrose's indifference curve when his consumption bundle is (1, 11) ?

A) -1/11
B) -11/1
C) -12
D) -2
E) -1