I have no idea how to solve this, please help with the answer

Which of the following graphs represents the function f(x) = 2^x

Which property was used to simplify the expression? 3c+9 +4c=3c+4c+9

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)