Estelle's graduation picnic will cost $15 if it has 5 attendees. If there are 26 attendees, how much will Estelle's graduation picnic cost? Solve using unit rates.

You can try to do a direct rule of three in this exercise.

We can considerr that the relation is proportional and we know that in this case it's dorect, as the more attendees there come, the more Estelle will have to pay, so we can write this and get x:

5 attendees - 15 dollars

26 attendees -  x dollars

x = 26*15 /  5 = 78 dollars

So you know how much Estelle would have to pay

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step-by-step explanation: