Which numerical setup can be used to calculate the heat energy required to completely melt 100 grams?

When only separate discreet points are graphed it is called?

What is the average rate of change for this function for the interval from x=2 to x=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.