Another concept we need to remind you of before starting calculus: rate of change. The rate of change is found by selecting two points on your straight line and finding the change in y over change in x. The rate of change is the same no matter which two points you pick on a straight line graph, but it will be different when you have a quadratic.
Posted from my blog with SteemPress : http://magicmonktutorials.com/blog/2018/11/16/pre-calculus-rate-of-change-lesson-1/
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