The quadratic parent function is ...
... f(x) = x² . . . . . . . or . . . y = x²
Its graph ...
- opens upward
- has its vertex at the origin
- is symmetrical about the vertical line through the vertex
- goes through points (±1, 1)
The last feature can be used to determine the (vertical) scale factor of any functions that are derived from this parent function.
