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The image shows a lesson on interpreting graphs of proportional relationships. The example provided demonstrates how to interpret a graph that shows the proportional relationship between pounds of mangos and their cost.

### Key Details from the Example:
1. **Points on the Graph**: 
   - The point $ (0, 0) $ means 0 pounds of mangos cost \$0.
   - The point $ (3, 4.5) $ means 3 pounds of mangos cost \$4.50.

2. **Constant of Proportionality**:
   - The constant of proportionality can be found by looking at the point on the line where the x-coordinate is 1.
   - The graph passes through $ (1, 1.5) $, meaning the cost for 1 pound of mangos is \$1.50.
   - So, the **constant of proportionality** is $ 1.5 $ dollars per pound.

### Question 1 (a):
It asks you to find the constant of proportionality for the relationship between grams of protein and cups of milk, which would involve interpreting a similar proportional graph for a different scenario (grams of protein vs. cups of milk).

Let me know if you have any specific questions regarding this content or if you would like further clarifications on finding the constant of proportionality!

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### Relative Questions:
1. How do you calculate the constant of proportionality from a graph in general?
2. What does the constant of proportionality tell you in a real-world context?
3. Can you explain how the points $ (0, 0) $ and $ (3, 4.5) $ help find the constant of proportionality?
4. How can you verify that a relationship is proportional using the graph?
5. What happens if the line on the graph does not pass through the origin (0, 0)?

### Tip:
When dealing with proportional relationships, always check that the graph passes through the origin. This confirms that the relationship is indeed proportional!

What is the constant of proportionality for the relationship between pounds of mangos and cost?

Learn how to find the constant of proportionality in a proportional relationship using a graph. This example shows the relationship between pounds of mangos and cost, and explains key concepts of graph interpretation.

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