AUTOMOTIVE CAREER EDUCATION DESCRIPTIONS
To use a living plant as an example, as it grows, you can see the difference in size, or the increase over a period of several days and you could measure the growth, using conventional means. However, if you were to measure the difference in size after only ten seconds, it would be much more difficult to determine. If you then were to attempt to determine not the amount of growth over the time period, but the rate of growth over those seconds, you would not be able to do that using algebraic terms.
The science of calculus allows you to determine the rate of change for infinitesimally small amounts. There are a number of functions which impact the rate of change for the above example of a growing plant; things such as amount of sunlight, water, the temperature and others. However, if all other things remain equal, the variable for the rate of growth is time. By using calculus these variables can be determined. Most of the work in calculus is done by graphing formulas in order to determine the slope of the rate of change.