Which of the following is a horizontal stretch of the parent function?

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

Which of the following represents a function? 50 !

Asalsa recipe uses green pepper, onion, and tomato in the extended ratio 3: 5: 7. how many cups of tomato are needed to make 105 cups of salsa? a. 7 b. 21 c. 35 d. 49