Advanced MathHardStarting height from vertex form
Advanced Math practice question
The height h, in metres, of a thrown ball t seconds after release is modelled by h(t) = −(t − 3)² + 12. From what height, in metres, was the ball released?
Answer: 3
At t = 0, h = −9 + 12 = 3.
Common wrong answers
- If you answered 9
- 9 is (0 − 3)² without the 12.
- If you answered 12
- 12 is the maximum height.
- If you answered -9
- −9 forgets the +12.
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