Often the most difficult part of solving a system of equations problem is writing out the system from a word description. In this FAQ, we look at a complicated sounding problem and form a system of linear equations from the problem.
This FAQ explores how to take a story problem and write it out as a system of linear equations.
Often a rate function or derivative is given by data or a graph. If we can find a function for the data, we can take the antiderivative of the function to undo the rate. But what if the rate is given by a graph whose formula is unknown?