Advanced MathHardInitial value from vertex form
Advanced Math practice question
The height h, in metres, of a jet of water t seconds after it leaves a fountain is modelled by h(t) = −(t − 2)² + 20 for 0 ≤ t ≤ 6. What is the height of the jet at t = 0?
Answer: 16
−4 + 20 = 16.
Common wrong answers
- If you answered 4
- 4 is (0 − 2)² without the 20.
- If you answered 20
- 20 is the maximum height.
- If you answered -4
- −4 forgets the +20.
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