Quizzes Ch. 5 Quadratics quiz · Period 3 · Fri Sep 11
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Student Score
Aiden Brooks
11/12
Maya Chen
12/12
Diego Flores
5/12
Emma Rodriguez
9/12
Jordan Hayes
—
Priya Nair
10/12
Sam Okafor
6/12
21 more

Questions, hardest first

3Max height of the ball
42%
1Vertex of y = (x − 3)² + 4
71%
2Solve x² − 5x + 6 = 0
88%

Emma Rodriguez · Question 3

Long answer · 6 points
Her answer
t = −b/2a = −32 / (2·−16) = 1 s
h(1) = −16 + 32 + 5 = 21 ft
(max because a is negative so it opens down)
Suggested score
6 / 6 confident
Finds t = 1 s · 2 pts
Finds h = 21 ft · 2 pts
Explains with −b/2a · 2 pts
Feedback, in your voice

Clean work, Emma. Nice call noting the parabola opens down; that's the reason the vertex is a maximum.

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