Quite definitely and clearly, the graph looped down to zero.
The graph looked as if a drunken caterpillar had been sketching on it.
For a while there was only the whining of the machines and the crazy doodling of the graph.
We have a picture, or graph, as we say, of how this plate current varies.
Then we would represent the story of this 60 cents by the graph of Fig. 61b.