"the argument" of a function, is simply "the expression being evaluated by that function".
The vertex form:

(h,k) - the coordinates of the vertex

The coordinates of the vertex are
(-4,13).
Answer:
C I think, im not sure but sorry if im wrong
Step-by-step explanation:
Answer:
27 pounds
Step-by-step explanation:
You need to multiply 4.5 by 6.
Hope this helps.
(k-7) would be the equation