They both have the same rate of change
The answer is x=-2 because its the only one thats parallel to the y axis
Profit will be achieved when the money earned is greater than the money spent so,
336 + (n*12) = n*28 any subsequent units sold would result in profit
336 = 28n - 12n
336 = 16n
=> n = 336/16 = 21
21 units must be sold to draw even any more would result in profit
87% of 73 is about 63.51 and 73% of 87 is 60.59 so 87% of 73 is greater
The answer is option c- 68°
