# IB Math IA: Basketball Shot Quadratic | IB Math IA | Mr. Flynn IB

TLDRIn this educational video, Mr. Flynn demonstrates how to create a quadratic function from a basketball shot video using Logger Pro. He scales the video with a known object, sets up axes, and captures the basketball's trajectory points. The video concludes with fitting a quadratic curve to the data, yielding the equation y = -0.3133x^2 + 1.198x + 2.137. The lesson sets the stage for further analysis using calculus and quadratic knowledge in future lessons.

### Takeaways

- π The video demonstrates creating a quadratic function from a basketball shot using Logger Pro software.
- π The process involves scaling the video with a known object, such as a foam roller, to establish a reference for measurements.
- π₯ The basketball shot video is taken from the side to ensure the trajectory is in line with the basket.
- π A child's basketball is used, noting that using a different ball would result in a different function.
- π Axes are set with the origin at the feet of the shooter and aligned with the bottom of the net for the y-axis, and the x-axis is for horizontal distance.
- π The video frames are analyzed to track the basketball's trajectory, capturing the center of the ball on each frame.
- π A quadratic curve fit is applied to the collected data points to model the trajectory of the basketball shot.
- π The resulting quadratic function is given in the form y = ax^2 + bx + c, with specific coefficients for a, b, and c.
- π The video script mentions the importance of mathematical notation and the need to convert Logger Pro's output into standard form.
- π The script outlines plans for future lessons to analyze the quadratic function using calculus and to explore practical applications in basketball shooting.
- π The takeaway emphasizes the educational aspect of the video, aiming to show how to apply mathematical concepts to real-world scenarios.

### Q & A

### What is the main purpose of the video?

-The main purpose of the video is to demonstrate how to create a quadratic function from a basketball shot using Logger Pro software.

### What software is used to analyze the basketball shot in the video?

-Logger Pro Demo is the software used to analyze the basketball shot in the video.

### Why is it important to have a straight-on video angle for this analysis?

-A straight-on video angle is important because it allows for accurate measurement and scaling of the basketball's trajectory without distortion.

### What is the significance of using a known length object like a foam roller for scaling in Logger Pro?

-Using a known length object like a foam roller helps to accurately scale the video, ensuring that the measurements of the basketball's trajectory are precise.

### How does the video ensure the basketball's trajectory is accurately captured on the y-axis?

-The video ensures the basketball's trajectory is accurately captured on the y-axis by aligning the origin with the bottom of the net and placing the basketball right on the y-axis.

### What does the x-axis represent in the analysis of the basketball shot?

-In the analysis, the x-axis represents the horizontal distance from the shooter to the basket.

### What does the y-axis represent in the analysis of the basketball shot?

-The y-axis represents the vertical distance or height of the basketball at various points in its trajectory.

### What is the shape of the trajectory described by the quadratic function?

-The shape of the trajectory described by the quadratic function is parabolic, which is typical for projectile motion.

### What is the general form of a quadratic function and how does it relate to the basketball shot?

-The general form of a quadratic function is y = ax^2 + bx + c. In the context of the basketball shot, it represents the height of the basketball as a function of the horizontal distance from the shooter.

### What are the specific values of a, b, and c in the quadratic function derived from the basketball shot?

-The specific values of a, b, and c in the quadratic function are a = -0.315, b = 1.198, and c = 2.137.

### What will be covered in the next lesson according to the video?

-In the next lesson, the instructor plans to analyze the derived quadratic function using calculus and knowledge of quadratics to find properties like maximum height and launch angle, and discuss how these can be applied in an IA (Internal Assessment).

### Outlines

### π Creating a Quadratic Function from a Basketball Shot Video

The speaker introduces a project to create a quadratic function from a basketball shot video using Logger Pro Demo. They open the software, import the video, and discuss the importance of the video's perspective. The video shows a side view of a basketball shot, which is crucial for accurate trajectory analysis. The speaker then explains how to use the software's features to scale the video using a known object, such as a foam roller, to establish a reference length. They proceed to set the axes, with the origin at the feet and aligned with the bottom of the net, and the basketball on the y-axis. The process involves capturing the basketball's trajectory frame by frame to plot points on the graph.

### π Analyzing the Basketball Trajectory with a Quadratic Curve Fit

In this paragraph, the speaker focuses on analyzing the basketball's trajectory using the data collected from the video. They plot the x and y distances on a graph, which initially shows a straight line for x and a parabolic shape for y. The speaker is only interested in the y-axis data, which represents the vertical distance of the basketball over time. They use Logger Pro's curve fitting feature to fit a quadratic function to the y data. The software provides coefficients for the quadratic equation in the form of 'ax^2 + bx + c', which the speaker rounds to three significant figures, resulting in the equation y = -0.3133x^2 + 1.198x + 2.137. The speaker concludes by mentioning future lessons that will explore analyzing the function using calculus and quadratic knowledge to find maximums and optimal launch angles, and how to apply this knowledge in a practical context.

### Mindmap

### Keywords

### π‘Quadratic function

### π‘Logger Pro

### π‘Projectile

### π‘Scale

### π‘Axes

### π‘Curve fitting

### π‘Significant figures

### π‘Parabolic shape

### π‘Launch angle

### π‘IA (Internal Assessment)

### Highlights

Introduction to creating a quadratic function from a basketball shot video.

Using Logger Pro Demo software for data analysis.

Importing and aligning the basketball shot video for accurate measurements.

Ensuring the video is taken from a side angle for proper alignment with the basket.

Explanation of the importance of the first shot not scoring as expected for data analysis.

Using a foam roller as a known distance to scale the video for accurate measurements.

Setting up axes with the origin at the feet and aligned with the bottom of the net.

Capturing the basketball's trajectory by clicking through each frame.

The significance of the parabolic shape of the basketball's trajectory.

Differentiating between the x and y axes for horizontal and vertical distances.

Using the curve fit tool in Logger Pro to fit a quadratic function to the data.

Conversion of the raw data into a quadratic function with coefficients a, b, and c.

Discussion on the importance of proper mathematical notation for the quadratic function.

Final quadratic function formula presented: y = -0.3133x^2 + 1.198x + 2.137.

Plans for the next lesson involving calculus and analysis of the quadratic function.

Potential applications of the quadratic function in an IB Math IA project.

Teaching how to find maximums and launch angles using the quadratic function.

Encouragement to compare and improve basketball shots using the derived quadratic function.