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The question asks which graph shows that \( T \) is inversely proportional to \( x \). 

When two variables are inversely proportional, their relationship can be described as:

\[
T \propto \frac{1}{x}
\]

This means as \( x \) increases, \( T \) decreases, and vice versa, and the graph of \( T \) versus \( x \) will have a downward curve that approaches the axes but never touches them. 

Looking at the graphs:

- **Graph D** shows a curve that decreases as \( x \) increases, which is the characteristic shape of an inverse proportionality.

Thus, the correct graph is **D**.

Do you have any questions or want further details? 

Here are five related questions to expand on this topic:
1. What does it mean for two variables to be directly proportional?
2. How would the graph of \( T \propto x \) look like?
3. What are some real-life examples of inverse proportionality?
4. How can we represent inverse proportionality algebraically?
5. How do the slopes of these graphs change as \( x \) increases?

**Tip:** Inverse proportional relationships often appear in situations involving rates, such as speed versus time, where increasing one decreases the other.

One of the graphs could show that T is inversely proportional to x. Write down the letter of this graph.

Learn how to identify inverse proportionality from graphs. This example shows T inversely proportional to x, explained through various graphical representations. Suitable for students in Grades 8-10.

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