Criterion A: The topic of the Internal assessment is stated clearly and explained in the introduction

Comment: The topic of the Internal Assessment ("The Rate Audio Decay at Different Frequency") was first stated on the title page. Then, the aim was stated in the introduction.

Criterion A: The topic of the Internal assessment is stated clearly and explained in the introduction

Comment: The topic of the Internal Assessment ("The Rate Audio Decay at Different Frequency") was first stated on the title page. Then, the aim was stated in the introduction.

Criterion B: The main concepts are described in the introduction

Comment: In the introduction, the student explained the aim of the study, which was to develop a mathematical function, with frequency as a substitutable constant, that would illustrate the rate of audio decay at that respective frequency.

Criterion A: The introduction includes a general description of the student's approach to the topic and what area of the math curriculum the exploration focuses on

Comment: The student intended to develop a mathematical function that would illustrate the rate of audio decay at that respective frequency

Criterion B: The main concepts are described in the introduction

Comment: In the introduction, the student explained the aim of the study, which was to develop a mathematical function, with frequency as a substitutable constant, that would illustrate the rate of audio decay at that respective frequency.

Criterion A: The conclusion is a summary of the outcomes and a response to the aim of the exploration stated in the introduction

Comment: The student answered the research question, which was “How does the rate of audio decay due to distance from the source vary with different sound frequencies?”. They also claimed to obtain their goal and verified their initial hypothesis.

Criterion A: The use of technology, when applied, is clearly indicated and explained

Comment: Figures 4-7 are screenshots of some kind of a software or program but its name was not written down. The name of the software should have been stated and alongside a proper citation.

Criterion A: If analytical software is used, its purpose is described and the link to it is provided

Comment: The use of Desmos was indicated and explained but the student should have also cited the software.

Criterion A: The exploration is 12-20 pages long (excluding the bibliography and appendices)

Comment: For the Internal Assessment, the student should have stated the page count, not the word count.

Criterion A: The exploration is 12-20 pages long (excluding the bibliography and appendices)

Comment: The student should have fit within the range of maximum of 20 pages.

Criterion B: Key terms/variables are defined and explained when first introduced

Comment: The "Background" was where the student explained key terms, such as the inverse square law. This explanation was supported by a diagram.

Criterion B: The main concepts are described in the introduction

Comment: In the introduction, the student explained the aim of the study, which was to develop a mathematical function, with frequency as a substitutable constant, that would illustrate the rate of audio decay at that respective frequency.

Criterion A: The topic of the Internal assessment is stated clearly and explained in the introduction

Comment: The topic of the Internal Assessment ("The Rate Audio Decay at Different Frequency") was first stated on the title page. Then, the aim was stated in the introduction.

Criterion A: The introduction includes a general description of the student's approach to the topic and what area of the math curriculum the exploration focuses on

Comment: The student intended to develop a mathematical function that would illustrate the rate of audio decay at that respective frequency

Criterion B: The main concepts are described in the introduction

Comment: In the introduction, the student explained the aim of the study, which was to develop a mathematical function, with frequency as a substitutable constant, that would illustrate the rate of audio decay at that respective frequency.

Criterion B: Additional terms are defined in detail in appropriate places (dependent on the development of the exploration)

Comment: When presenting a formula, the student defined all of the terms and premises

Criterion B: Additional terms are defined in detail in appropriate places (dependent on the development of the exploration)

Comment: When presenting a formula, the student defined all of the terms and premises

Criterion B: All mathematical calculations are explained and any data presentation is described

Comment: The student presented calculations step by step. The student included action comments that made their way of thinking clear and easy to understand. No shortcuts were detected.

Criterion B: The degree of accuracy is stated for any rounded values

Comment: The coefficients in Table 4 can be assumed to be rounded values. The student should have stated the degree of accuracy of the rounded values, here 7 decimal places (7 d.p.)

Criterion B: The student used a deductive method and set out logical proofs where appropriate

Comment: The student's way of reasoning is logical. The statements are justified or proved.

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Criterion B: The main concepts are described in the introduction

Comment: In the introduction, the student explained the aim of the study, which was to develop a mathematical function, with frequency as a substitutable constant, that would illustrate the rate of audio decay at that respective frequency.

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