-A bar graph displays date with vertical or horizontal lines. Bar Graph Bar graphs are used to compare categorical data using bars. Amount of rainfall on different days in a week, the favorite colors of grade 3 students, the number of students enrolled in different grades in a school in a particular academic year, etc are examples where you use bar graphs. You can use bar graphs to compare your test scores.

 Use a number line and X’s  A line graph is often used to represent a set of data values in which a quantity varies with time  These graphs are useful for finding trends.  That is, finding a general pattern in data sets including temperature, sales, employment, company profit or cost over a period of time. Solved Example on Line Graph Irena recorded her test scores in a line graph as shown. What is Irena's score on the Math test? Choices: A. 50 B. 80 C. 60 D. 40 Correct Answer: C Solution: Step 1: The height of each point in the line graph represents Irena's score on the particular test. Step 2: Note the height of the point representing Irena's score on the Math test. Step 3: The height of the point is 60. Step 4: So, Irena scored 60 on the Math test.

 The histogram is a summary graph showing a count of the data points falling in various ranges. The effect is a rough approximation of the frequency distribution of the data. E xample 1: The histogram below shows the heights (in cm) distribution of 30 people. a) How many people have heights between and cm? b) How many people have heights less than cm? c) How many people have heights more than cm? d) What percentage of people have heights between and cm?

. Shows data that changes over time. Temperatures In NY City DayTemperature 143° F 253° F 350° F 457° F 559° F 667° F Example 1.

 Shows data arranged by place value ( Hint : 2/2=24) The "stem" is the left-hand column which contains the tens digits. The "leaves" are the lists in the right-hand column, showing all the ones digits for each of the tens, twenties, thirties, and forties. As you can see, the original values can still be determined; you can tell, from that bottom leaf, that the three values in the forties were 40, 40, and 41.

 Shows parts of a whole. Examples of Circle Graph In the example shown below, the circle graph shows the percentages of people who like different fruits. Each sector in the circle graph represents the percentage of people liking the respective fruit.

 Is a graph with points plotted to show a relationship between to sets of data Let's decide if studying longer will affect Regents grades based upon a specific set of data. Given the data below, a scatter plot has been prepared to represent the data. Remember when making a scatter plot, do NOT connect the dots. Study HoursRegents Score