Answer:
Defined and explained in the explanation section
Explanation:
A) Difference between a variable and a parameter is that;
A variable is simply the way in which an attribute or quantity is represented while a parameter is normally a constant value or symbol in an equation that describes a model.
B) In a family of a function like a quadratic function of say:
f(x) = ax² + bx + c.
In this example, the variable is x which is the input to the function while the symbols a, b, and c are the parameters which determine the behavior of the function f. Thus, for each value of the parameters a, b, c, we will obtain a different function.