6 equilateral triangles
6^2 or 36
so we need 6n need to be a perfect cube
so n has to be 6^2 so that 6n is 6^3
what i'm saying is if you let n be 6^2 you have 6^3×10^3 or 60^3 which is a perfect cube
b if for most of the graph
d if y intercept
i believe the correct answer is b.