To determine the height of the balloon 3 minutes after being released, you would typically look for the corresponding y-coordinate on the graph at x = 3 minutes. However, since I cannot see the graph you are referring to, I'm unable to provide the specific height of the balloon at that time.
If you have access to the graph, please locate the point where x = 3 and read the accompanying y-value, which will give you the height in feet.
If you'd like further assistance, you can describe the graph or provide its equation for additional help!