The range of the function is approximately 0.9 ≤ M ≤ 6
The range of a function is the set of all possible output values that the function can produce. In the case of this graph, the output values are the masses of the bucket containing liquid, and the input values are the volumes of liquid in the bucket.
From the graph, we can see that the mass of the bucket starts at about 0.9 kg when the volume of liquid is 0 liters, and it increases as the volume of liquid increases. The mass appears to approach, but never reach, a value of 6 kg as the volume of liquid increases.
Therefore, the range of the function is approximately:
0.9 ≤ M ≤ 6