The temperature on any given summer day may be in the 80s or 90s ... The National Weather Service describes the heat index using the time-worn saying, "It's not the heat, it's the humidity." ...

A line graph is used to spot trends in data over time. In order to produce a line ... This line graph represents the average temperature during a year in Greece. This line graph shows the ...

To understand what a time graph is showing you, you need to look at three things: 1. Title - The title tells you what the graph is about. For example, "Temperature on the First of September." ...