In this situation, the constant of proportionality represents the cost per donut. To find the cost of different quantities of donuts, we can set up an x-y table and graph.
Let's start by filling out the x-y table:
Number of Donuts (x) | Cost (y)
--------------------------------
4 | $4
To find the cost of different quantities of donuts, we can use the given information that Kari bought 4 donuts for $4. Since the cost is the same for each donut, we can divide the total cost by the number of donuts to find the cost per donut.
Cost per Donut = Total Cost / Number of Donuts
Cost per Donut = $4 / 4
Cost per Donut = $1
Now, let's complete the x-y table:
Number of Donuts (x) | Cost (y)
--------------------------------
4 | $4
1 | $1
2 | $2
3 | $3
Next, we can plot the points on the graph. The x-axis represents the number of donuts, and the y-axis represents the cost.
Now, imagine a graph with the x-axis labeled "Number of Donuts" and the y-axis labeled "Cost." The points (4, $4), (1, $1), (2, $2), and (3, $3) would be plotted on the graph.
I hope this helps! Let me know if you have any other questions.