Respuesta :
Answer:
y = -1x + 30
Step-by-step explanation:
The jar of mayonnaise holds 30 ounces. Then thats the start you have 30 ounces, and everytime you make a sandwich you use 1 ounce. If you make 5 sandwich you will use 5 ounces, then the ounces used will be 1 * number of sandwichs. representing the number of sandwich by "x" you have:
y = -x + 30