Answer: The required function formula is,
S(R) = 85 + 5 R
Step-by-step explanation:
Given,
The price of each raffle = $ 5,
⇒ The price of 10 raffle = 10 × 5 = $ 50
Since, her total spending at the fundraiser = Her admission fee + price of raffle she buys,
⇒ Her total spending when she buy 10 raffle = Her admission fee + $ 50
According to the question,
Her admission fee + $ 50 = $ 135
⇒ Her admission fee = 135 - 50 = $ 85
Hence, if she buys R raffle then her spending = 85 + 5 R
Here, S represents her total spending,
⇒ S = 85 + 5 R
Or S(R) = 85 + 5 R
Which is the required function formula.
