Learning Resources

Focus D: Creating the Transformational Form of a Quadratic

Test yourself (Answers)

1.

The vertex of the parabola is . Since the parabola opens downward, the y-coordinate is the maximum value. Therefore the maximum is .

2. First write the equation in transformational form:

The vertex is at (2 , 21.5). This is a highest point since the parabola opens downward. Therefore the maximum height reached by the hammer is 21.5 metres and this occurs 2 seconds after the hammer is thrown.