Which situations are not directly proportional? Select all that apply.
Parking time and cost when there is a fixed entry fee plus an hourly charge.✓Respuesta correcta
Travel time and distance from the start at one constant speed.
A temperature in degrees Celsius and the same temperature in degrees Fahrenheit.✓Respuesta correcta
Servings and each ingredient amount in one consistently scaled recipe.
A square's side length and its area.✓Respuesta correcta
Explicación
A parking entry fee creates a nonzero intercept, Celsius and Fahrenheit differ by both scaling and an offset, and square area grows with the square of side length, so these are not direct proportions. Ingredients for a fixed recipe are the closest distractor because doubling servings doubles each ingredient, while constant-speed distance also starts at zero and scales with time.