Posts by JDM Educational Staff

The axis of symmetry is a line that splits an object in half to give us “mirror images” on both sides of the line.  For a parabola, the axis of symmetry is determined by two coefficients of...

Inverse functions help us to “undo” the action of a function.  When composed, a function and its inverse leave an input unchanged (the identity function). So, what is an inverse...

Inequalities are used to compare numbers and to indicate a range of values.  They can also be used to express uncertainty (as in the case of an estimate), but there is a lot more to know about...

Pascal’s Triangle is useful in algebra, probability, and combinatorics when we need to expand binomials raised to an integer power.  However, it always helps to know where it comes from and...

Geometric series are used in mathematics whenever we want to add up a sequence of numbers that grows or shrinks by a fixed percentage at each step.  However, there are a few things you should...

Percentile is used in statistics to give us an idea of where a data value lies in relation to a group of data points.  It is also useful for ranking purposes, but it is important to know how to...