Not using graph how would I be able to solve this

Answer:
[tex]\frac{6}{y^4}[/tex]
Step-by-step explanation:
Any variable (say a) to the power of "-x" is 1/(a^x). Keeping that in mind, we figure out that 6(y^(-4)) = 6*1/y^4 = 6/(y^4)
Step-by-step explanation:
[tex]6y {}^{ - 4} = \frac{1}{6y {}^{4} } [/tex]
A negative exponent just means that the base is on the wrong side of the fraction line, so you need to flip the base to the other side.