*by Shaun Klassen*

One of the mathematics subjects most feared by students is the “dreaded” differential calculus subject. Absolutely, it is more complicated than more common basic algebra that most would have studied up to this point. And of course, to work with calculus, one must be familiar with all of the earlier concepts that build up a strong mathematical foundation, including things like algebra, trigonometry, and graphing. However, this is not to say that calculus has to be hard, or “impossible.” It is completely doable if you start slowly by learning the general problem solving strategies. In this guest post, I want to introduce the main concept of differential calculus – **the derivative** – and I encourage you to visit my math website to find out much more information about this subject.

The name “**differential calculus**” is a descriptive one – it is based on differences, or changes. More specifically, it is all about describing how one quantity changes with respect to another one, or in other words, the rate of change. The derivative is used to express this function, but let’s examine this concept a little more closely by considering everyone’s favourite rate of change: velocity. Continue reading