The correct answer is 5
Explanation: The Linear Function is a function f: ℝ → ℝ defined as f (x) = a.x, being a real number and nonzero. This function is a particular case of the affine function f (x) = a.x + b, when b = 0.
The number that accompanies the x of the function is called the coefficient. When its value is 1, the linear function is also called the identity function.