What factor is used to convert miles per minute to mile per hour

What is the slope of the line shown below?

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.

For f(x) = 3x+1 and g(x) = x2 - 6, find (g/f)(x)