Answer: $0.25
Explanation:
Let x be the total money was in her wallet and m be the cost of each petunia,
From the given table , the money left in wallet after purchasing 2 petunia =$6.50
Then we have the following equation :-

Also, the money left in wallet after purchasing 8 petunia =$5
Then, we have

Subtracting (2) from (1) , we get

Hence, the price of one petunia = $0.25