👉 Linearity is a property of linear functions, which are mathematical equations that involve only one variable and have an exact relationship between their variables. This means that for any two values of the same variable, their corresponding outputs or inputs will always be equal to each other. For example, if we have a linear function f(x) = ax + b, where x and y are variables, then f(a
x) = a
f(x) + b and f(b
y) = b
f(y), which