What is a inear function?

A linear function is a mathematical function that can be expressed in the form ( f(x) = mx + b ), where ( m ) is the slope and ( b ) is the y-intercept. This type of function produces a straight line when graphed on a coordinate plane. The slope ( m ) indicates the rate of change of the function, while the y-intercept ( b ) represents the value of the function when ( x ) is zero. Linear functions are characterized by their constant rate of change.