SME
Grade 9 Math
Function notation, domain and range, key features of graphs and average rate of change
The main lesson, then each kind of problem it solves.
Function notation, domain and range, key features of graphs and average rate of change
Main lesson
Evaluate a quadratic
Use this for “f(x) = 2x² − 3x + 1. Find f(−2).”
Domain and range
Use this for “f(x) = −2x + 5 for −1 ≤ x ≤ 4. What is its range?”
Average rate of change
Use this for “Find the average rate of change of f(x) = x² − 4x + 1 from x = 1 to x = 4.”
Transform a function: g(x) = a·f(x − h) + k
Use this for “f(x) = x². Graph g(x) = 2f(x − 3) + 1. Where does the point (1, 1) of f go?”