SME
Grade 9 Math
Graphing quadratic functions: vertex, axis of symmetry and zeros
The main lesson, then each kind of problem it solves.
Graphing quadratic functions: vertex, axis of symmetry and zeros
Main lesson
Standard form: the vertex from −b/(2a)
Use this for “Find the vertex and the zeros of y = x² − 6x + 5.”
Factored form: the zeros
Use this for “Graph y = −2(x − 1)(x − 5): its zeros, axis, vertex and y-intercept.”
A ball thrown up
Use this for “A ball is thrown up at 19.6 m/s from 2 m. When is it highest, and how high?”
Linear, quadratic or exponential?
Use this for “Which kind of function fits this table: linear, quadratic or exponential?”