The gradient of line joining (0,0) and (3,6) is​

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.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.

Sketch one cycle if the cosine function y=2cos2theta