What is the domain and range for {(0,-4)}

Abarbecue sold 26 hamburgers and hot dogs. hamburgers sell for $3.50 each and hot dogs sell for $2.00 each. if the barbecue made $70 in sales, determine and state the number of hot dogs sold.

What is always true when two whole numbers are subtracted?

What function has a range {yly< 5}? question on picture above^