ANSWER
y varies inversely as x exponent 4.
EXPLANATION
The inverse variation equation is given as:

We can see that there is an inverse relation between the quantity y and x.
If the it were
, we say y varies inversely as the square of x.
Hence for the given relation,the precise definition is that, y varies inversely as x exponent 4.
Should be 72 ounces, as he used 23/24 of the blueberries and 69/72 = 23/24.
7+4=11 if that is your question not 100% sure what you are asking.