Answer:
the constant of the function is, 6
Explanation:
For a quadratic equation:

where a, b are coefficient of the quadratic equations and c is the constant and x is the variable
As per the statement:
Consider the quadratic function:

Constant term of the given polynomial is the coefficient which is not written with a variable.
In the given function f(y);
y is the variable
and
6 is the constant term of the polynomial f(y).
therefore, the constant of the function is, 6