# Secondary Catalogue

## Mathematics & Statistics

### Vertex, Axis, Focus, Directrix of a Hyperbola

Hyperbolas are conic sections that are like double parabolas. In this video we'll look at all the different geometric components of the graph of a hyperbola, including its vertex, axis, focus, and its directrix.

### Building Histograms from Data Sets

In this video we'll work on actually building a histogram from a data set. In order to build a histogram, we'll need to determine the class interval, which means we'll need to look at class width and class midpoint.

### Binomial Random Variables

Remember that “bi” means two, so a binomial variable is a variable that can take on exactly two values. A coin is the most obvious example of a binomial variable because flipping a coin can only result in two values: heads or tails.

### Measures of Spread

Range and interquartile range (IQR) are both measures of spread, also called measures of dispersion or scatter. They measure how much the data is spread out around the center point of the data set.

### Horizontal Line Test

Learn to use the horizontal line test to determine whether or not a function is 1-to-1.

### Moments of the System

Applications of Integrals: Physics

Learn how to find the moments of a system given point masses and their coordinates.

### Improper Integrals, Case 4

Learn how to integrate an improper integral with limits of integration [a,b], where an infinite discontinuity exists in the interval, and therefore the integral has to be split into to improper integrals.