Nancy wants to make a graph to show the relationship between the temperature of water, in degrees Celsius, and the time, in minutes, for which water is heated. She plots the following points: (0, 50), (1, 60), (2, 70), (3, 80), (4, 90)

She uses the following steps to plot the graph:

1. Label origin as (0, 0).
2. On x-axis, label Time in minutes.
3. On y-axis, label Temperature in degrees Celsius.
4. The scale on x-axis starts from 0 and goes up to 5 at intervals of 1.
5. The scale on the y-axis starts from 0 and goes up to 200 at intervals of 50.