A. Yes the table represents a proportional relationship
B. The constant of proportionality is 1.2
Step-by-step explanation:
Two quantities are proportional if:
- One of them is equal to the constant times the other one
- If x and y are proportion, then y = k x, where k is constant
∵ Total wight in pounds ⇒ 12  ,  18  ,  30  ,  60
∵ Number of books ⇒ 10  ,  15  ,  25  ,  50
- Divide each two corresponding data to check if all they give
  the same constant or not
∵ 12 ÷ 10 = 1.2
∵ 18 ÷ 15 = 1.2
∵ 30 ÷ 25 = 1.2
∵ 60 ÷ 50 = 1.2
- That means the total wight is equal to constant times the
  number of books
∴ Total wight = 1.2 Number of books
∴ The total wight and the number of books are in a proportional
  relationship
A. Yes the table represents a proportional relationship
∵ Total wight = 1.2 Number of books
∴ The constant of proportionality = 1.2
B. The constant of proportionality is 1.2
Learn more:
You can learn more about the proportionality in brainly.com/question/10708697
#LearnwithBrainly
