
Real World Quadratic Equations
Presentation
•
Mathematics
•
9th Grade
•
Practice Problem
•
Medium
Standards-aligned
Laura Auciello
Used 13+ times
FREE Resource
3 Slides • 3 Questions
1
Real World Quadratic Equations
2
Multiple Choice
A ball is thrown into the air from the edge of a 48-foot-high cliff so that it eventually lands on the ground. The graph below shows the height, y, of the ball from the ground after x seconds. How many seconds does it take for the ball to hit the ground?
5.5
0
2.5
cannot be determined
3
Domain is always time.
Time is always 0 or positive.
X-Values, smallest x-value is 0
4
Since the domain is always 0 or positive numbers, the domain is always the set of
WHOLE NUMBERS (0, 1, 2, 3, ...) because
integers (...-3, -2, -1, 0, 1, 2, 3, ...) include negative numbers
5
Multiple Choice
When Noami throws a ball from the edge of the cliff, she believes that set of integers would be an appropriate domain. Why isn't this correct?
Because time cannot be negative.
Because the height of the ball cannot be negative.
6
Multiple Choice
What is an appropriate domain for this graph that represents the height of a ball thrown from the edge of a cliff over time?
0≤x≤5.5
0≤y≤146
0≤y≤5.5
0≤x≤146
Real World Quadratic Equations
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