Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: Drew was measuring the growth of a vine that can grow almost 31 cm a day. Which would be the best way to record his data of the growth over a period of a day?
a line graph
Record growth in cm every hour.