Answer: The graph is attached.
Step-by-step explanation: We are given to draw the graph of the following equation:

where 'V' is the total volume of water in a bucket and 't' is the elapsed time in minutes.
Since equation (i) is a linear equation in two unknown variables, so the graph will be a straight line.
To draw the graph of a straight line, we need at least two points to be plotted on the graph paper and then joined straight.
If t = 0, then from equation (i), we have

If t = -2, then from equation (i), we have

So, (t. V) = (0, 4) and (-2, 0) are two points on the graph, if 't' is plotted along X-axis and 'V' is plotted along Y-axis.
These two points are joined to draw the graph of the given equation. Please see the attached graph below.