Welcome to Differential Calculus!
In this lesson, you'll learn the words "derivative" and "differential". They are mostly the same - we will learn the difference in Integral Calculus.
Although they may seem intimidating, the words "differential" and "derivative" just mean "the slope".
For example, if we have a function
then we say the derivative of the function is the slope, which is in this case.
Another way to write this is