Pamela J. Wells, Understanding Linear Functions and Their Representations, Mathematics Teaching in the Middle School, Vol. 21, No. 5 (December 2015/January 2016), pp. 308-316 ...

A month later, my understanding of trigonometric functions likewise deepened as I took over the class to learn to teach students using those same graphing calculators.

Unlike a linear, graph, a quadratic graph has an equation which includes an x squared term.

Learn about function notation, how to find an inverse function by changing the subject, and how to work with composite functions.

Sam Rhodes, Jessica Duggan, Cryptic Functions: Understanding Function Identification, The Mathematics Teacher, Vol. 112, No. 2 (October 2018), pp. 108-113 ...