Question

Which expression represents the product of 8 and y?

Answer 1

" the product " means multiply...

the product of 8 and y = 8 * y or just 8y

Answer 2

In algebra, the product of a number and a variable can be concatenated.
Like this: 8y

Of course, you can represent the product of 8 and y as (8)(y) and 8 * y.

Whatever, you prefer.