January 5, 2013
Show this problem to your child. This should not take more than 30 seconds. If you got my email you already know the correct answer. This is a question about function notation. More practice can be found at https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-relationships-functions/cc-8th-function-notation/e/functions_1.
If you'd like, share with me what your child said.