having a hard time answering the question below

Question

y varies directly as the fourth power of x and when x = 2y=112

Answer 1

y = kx⁴

When x = 2, y = 112

So, 112 = 16k

k = 112/16 = 7

y = 7x⁴

Answer 2

y varies directly as the fourth power of x.

56=y^4

y=2.7355.............