Answer:
Hence, the value of y is undefined.
Step-by-step explanation
[tex]log_{5} (-7) = \frac{log(-7)}{log(5)}[/tex] from the property, log_a (b) = (log(a))/log(b).
The value log (-7) was not defined. So, the entire log value also not defined.
Hence, the value of y is undefined.