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How to describe line graphs

Line Graphs

Introduction

A line graph, also known as a line chart, is a type of chart used to visualize the value of something over time. For example, a finance department may plot the change in the amount of cash the company has on hand over time. The line graph consists of a horizontal x-axis and a vertical y-axis. Most line graphs only deal with positive number values, so these axes typically intersect near the bottom of the y-axis and the left end of the x-axis. The point at which the axes intersect is always (0, 0). Each axis is labelled with a data type. For example, the x-axis could be days, weeks, quarters, or years, while the y-axis shows revenue in dollars. Data points are plotted and connected by a line in a "dot-to-dot" fashion. Line graphs are used to track changes over short and long periods of time and they are also used to compare changes over the same period of time for more than one group.

Objectives

These activities designed include two parts, the first part focusing on the expressions involved in the description of line graphs and the second part introducing the development of the line graph report.

Activity 1: Vocabulary used to describe line graphs

In this activity, you are going to grasp some useful expressions to describe line graphs.

Instruction

Look at the following five line graphs and choose the most appropriate expression to match each line graph.

The line graph below gives information on cinema attendance in the UK. Summarize the information by selecting and reporting the main features and make comparisons where relevant.

The line graph illustrates four different age groups of people who went to the cinema between 1990 and 2010.

Overall, The people's attendance was divided into four different age groups. Younger people seemed to be more active in movie going than their older counterparts except the group aged 14-24. However, all four age groups showed a gradual increase in attendance numbers during the given period, except for a slight drop between 1995 and 2000.

To be specific, a larger percentage of people between the ages of 24 and 34 went to the cinema than those in any other age group. Just over 50% of the respondents from this age group watched movies in 2010 while only about 38% went to the cinema in 1990. Even in the group that had the smallest number of movie goers (those between the ages of 44 and 54), there was an increase from approximately 15% to just over 20% in their attendance.