solve for y?

z=0.3(y-6)^2

please can you explain your working,

Many thanks,

Wendy.

2 answers

(10/3)z = (y-6)^2
y = sqrt[(10/3)z] +6
= 1.826 sqrt z + 6
I'm sorry. Really don't understand this. Where did the 10/3 come from in the first step?