To determine the unit rate of the proportional relationship on the graph, you need to find the slope. The slope represents the rate of change, or how much the cost per ounce changes for each additional unit.
Here's how you can find the slope:
1. Look at any two points on the graph that represent the cost per ounce. For example, let's choose the points (2, $0.50) and (4, $1.00).
2. Determine the change in the cost per ounce. In this case, the cost per ounce increases from $0.50 to $1.00.
3. Determine the change in the number of ounces. In this case, the number of ounces increases from 2 to 4.
4. Divide the change in the cost per ounce by the change in the number of ounces. In this case, (1, $0.50) and (2, $1.00), so the change in the cost per ounce is $1.00 - $0.50 = $0.50, and the change in the number of ounces is 4 - 2 = 2. Therefore, the slope (unit rate) of the proportional relationship is $0.50 รท 2 = $0.25.
Therefore, the unit rate of the proportional relationship is $0.25 per ounce.