Will a non linear function have a constant change in x that corresponds to a constant change in y

Kevin has just finished paying off his loan. he was assessed a service charge of $422. he paid off the principal and the interest by making weekly payments of $36.13 for four years. if the principal was $7,150, how much did kevin pay in finance charges, to the nearest dollar? a. $498 b. $365 c. $422 d. $787

Tell whether the two rates form a proportion

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0