sentences: the changes in temperature over a period of 24 hours need to be shown in a graph & hours hr are a metric unit used for measuring time generally used for values between 025 and 72 ->  the changes in temperature over a period of time need to be shown in a graph  the changes in temperature over a period of time need to be shown in a graph & a line graph is used for showing change / data over time -> a line graph can be used to show the changes in temperature over a period of time