Answer:
Yes, 1:0.75 (one to 0.75, or one to 75 cents)
Explanation:
How much does one pack of gum cost? 75 cents, right?
Then how much would 2 packs of gum cost?
- 0.75 + 0.75 = 1.50
- or: 2(0.75) = 1.50
Three packs?
- 0.75 + 0.75 + 0.75 = 2.25
- or: 3(0.75) = 2.25
- Look at what they gave you: "3 packs for 2.25"
- It's the same amount.
How about 6 packs?
- 6(0.75) = 4.50
- Look at what they gave: "6 packs for 4.50"
- Again, the same amount.
So the thing is, you'll pay a fixed 75c for every pack of gum you buy, which you can represent as 0.75x, where x is the number of packs.
Whenever you can multiply by a constant like that and it works out, that's a proportional relationship. The relationship is "1 to 0.75". If you want 10 packs of gum, multiply each side of the proportion to get "10 packs for 7.50."
Aa a real-life aside, sometimes when you buy things you get a little discount if you buy more of them. Have you ever seen that? I saw it recently on raffle tickets: they cost $3 each, but you could get 2 for $5. That is NOT a proportional relationship, because 2 tickets would only cost you 2.50 each, not $3.00.
You see it too with pounds of produce sometimes, or things like that.