Brian is analyzing the performance of certain stocks. He finds that for the first fifteen days of a 30 day period, the daily closing price per share of Phoenix Pharma Inc. conformed to the function f(x)=0.4x+2f(x)=0.4x+2 , where x represents the day in the period. He found that for the last 15 days in the same period, the stock followed the function f(x)=(−1/7)x+9f(x)=(−1/7)x+9, where x represents the day in the period. Approximately what is the median closing price per share of Phoenix Pharma Inc. for the entire 30 day period?  Select the correct option.
A) 4.7	B) 5.55	C) 6.71	D) 8	E) 11.1
First 15 days: F1, x= 1 to 15 and f(x)= 2.4 to 8   Last 15 days: F2, x= 16 to 30 and f(x) = ~4.7 to ~6.7 (30th to 16th)   Median is average of 15th and 16th value when all of the above values are arranged in order   Do not try to calculate all the values. Go for the choices.   11.1 - outside the range of values   8- last value   6.71 - last value for the F2, so already we have 15 values less than 6.71. Additionally F1 has some values less.   4.7 - First value for the F2, so already we have 15 values greater than 4.7. Additionally F1 has some values greater.   Hence 5.55 must be the answer.   ANSWER:5.55
<result>B</result>
Brian is analyzing the performance of certain stocks. He finds that for the first fifteen days of a 30 day period, the daily closing price per share of Phoenix Pharma Inc. conformed to the function f(x)=0.4x+2f(x)=0.4x+2 , where x represents the day in the period. He found that for the last 15 days in the same period, the stock followed the function f(x)=(−1/7)x+9f(x)=(−1/7)x+9, where x represents the day in the period. Approximately what is the median closing price per share of Phoenix Pharma Inc. for the entire 30 day period?