Linear Versus Non-Linear Function

Linear Function (Straight Line)

Examples :
(a) = 3x + 5
(b) 3y + 2x - 7 = 0


Non-Linear Function

Examples :
(a) y = a x 3 + b x 2

(b) y = a x + b x

(c) y = a b x

(d) y = x p + q x