Which table dose not represent a linear function?

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

When only separate discreet points are graphed it is called?

The total cost of anja’s trip to the dentist was $628.35. she paid a flat fee of $89.95 which included the checkup and cleaning and then had 4 cavities filled, each of which cost the same amount. which shows the correct equation and value of x, the cost of each cavity filling?