Formative Assessment 98

Assessment Problem: 

2. If f(1)=5 and f(x+1)=2f(x), find the value of f(3).

Mathematical Issues: 

Students struggle with function notation. These exercises can help teachers quickly see whether their students correctly interpret and use function notation. 1(a) and 1(b) are essentially the same problem except that one uses function notation and one does not.

Domain: 
Patterns & Functions
Theme: 
Function notation and transformation
Research References: 
Coady, C., & Pegg, J. (1994). Tertiary students' understanding of second order relationships in function notation. Paper presented at the 17th Annual Mathematics Education Research Group of Australasia Conference.