Which of these is a tangent line to y = - x^2 at x=4

Step-by-step explanation:

an equation of this tangent is : y = f' (4) (x-a) + f (4)

a = f' (4)

f (x) = - x²

a=4

f' (x) = - 2x

f' (4) = - 2 (4) = - 8

f (4) = - (4) ² = - 16

so : y = - 8 (x-4) - 16

y = - 8x + 16