👉 In linear algebra, a linear function is a mathematical operation that maps every input to exactly one output. This means that the output of the function depends only on the input and not on any other variables or operations. For example, if we have two functions f(x) = 2x + 1 and g(x) = x^2 - 3, then f(g(x)) will also be equal to 2(2x + 1) + 1 = 4x +