What was the highest temperature recorded?ĭid the value of the car increase or decrease over time?ĭid Sam's weight increase or decrease over time?Įxample 4: The graph below shows people in a store at various times of the day. What was the lowest temperature recorded? What is the range of values on the vertical scale? What is the range of values on the horizontal scale? Now that we are familiar with the parts of a line graph, we can answer some questions about each of the graphs from the examples above. The lines connecting the points give estimates of the values between the points.
The points or dots on the graph show us the facts. The horizontal scale across the bottom and the vertical scale along the side tell us how much or how many. The horizontal label across the bottom and the vertical label along the side tells us what kinds of facts are listed. The title of the graph tells us what the graph is about. Let's define the various parts of a line chart. The graph below will be used to help us define the parts of a line graph. Another name for a this type of graph is a line chart. A line graph is useful for displaying data or information that changes continuously over time. Each of these graphs shows a change in data over time. In Example 3, Sam's weight increased each month. In Example 2, the value of Sarah's car decreased from year to year. In Example1, the temperature changed from day to day. Value of Sarah's CarĮxample 3: The table below shows Sam's weight in kilograms for 5 months.
The dollar value of her car changed each year as shown in the table below. The data from the table above has been represented in the graph below.Įxample 2: Sarah bought a new car in 2001 for $24,000. Example 1: The table below shows daily temperatures for New York City, recorded for 6 days, in degrees Fahrenheit.
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