Write a function rule for the statement: The output is 4 times the input

Answer 1

A function is a one-to-one relationship that has exactly one output to every input. If we declare the input is an unknown value that could be any value, we will need a placeholder for any value that could be plugged in, x.

The output is a function of x, f(x), or "f of x". Now, let's translate the verbal phrase into an algebraic expression.

The output is four times the input.

f(x) is 4 times x

f(x) = 4x