The spread of a highly contagious virus in a high school can be described by the logistic function 3500 %3D 1+699e -09x where x is the number of days after the virus is identified in the school and y is the total number of people who are infected by the virus. (a) Graph the function for 0sxs 15. (b) How many students had the virus when it was first discovered? (cj What is the upper limit of the number infected by the virus during this period? (a) Choose the correct graph below. OA. OB. OC. OD. Q Q Q [0,15] by (0,3s00], Xeel=2, Yaci-1000 (b) The number of students who had the virus when it was first discovered is (c) The upper limit of the number infected by the virus during the period isO

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