University of Cambridge
University of Cambridge: Nrich: Graphing Number Patterns
On this one page website sharpen your logic, graphing and pattern recognition skills while working on this challenge. The solution is available to double check your solution.
Curated OER
Double Line Conic
An overview of the four types of conic sections is presented. The origin of how each conic is formed and a table of various characteritics specific to each type of conic is shown.