Final answer:
The equivalent expression for 1/y⁶ is y⁻⁶, which is answer option B).
Step-by-step explanation:
The student has asked to select the equivalent expression for 1/y⁶. The expression 1/y⁶ can be rewritten using the properties of exponents. Specifically, when you have a fraction with a variable in the denominator raised to a power, you can rewrite it as that variable to the negative power. Therefore, 1/y⁶ is equivalent to y⁻⁶, which corresponds to option B).