I need help please :( . Which equation best models the set of data ? A. Y = -3/4 x
B. Y= 6x -3/4
C . Y= -6x + 3/4
D. Y= 3/4x -6

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.