What is the vertex of the absolute value function defined by f(x)=|x+2|+4? a) (2,4)
b) (-2,4)
c) (-2,-4)
d) (2,-4)

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.