Cumulative Frequency corresponding to a particular value is the sum of all the frequencies up to and including that value. Box and whisker plots show the spread of data split in quartiles. Here’s a quick tutorial by Ben Rouse for constructing cumulative frequency graph and box and whisker plot.
What is a derivative function? The derivative function f is a function f’ that maps each value of x to the gradient or slope of the line tangent to f(x). Let’s have an example. Suppose your function f is defined by f(x)=x2. The derivative of f is the function f’ defined by f’(x) =2x. This