MATHEMATICS Pictograms

Lesson Objectives The aim of this powerpoint is to help you… to learn how to produce a pictogram to learn how to read and interpret a pictogram

Pictograms The key shows what one picture on the pictogram represents. If the picture is worth more than one, then part- pictures may need to be drawn. Instead of appearing in columns, most pictograms are set up so that the pictures are drawn in rows, so the first column contains the data labels.

Producing Pictograms Look at the data and pick ONE suitable picture to represent it Decide on how many items each picture will represent and set out your key For each section of the data, divide the frequency by the key value to work out how many pictures to draw Remember to line up (vertically) all the first pictures, second pictures and so on… Remember that any part pictures need to be drawn starting on the left and working to the right.

Producing Pictograms - Example This table shows the hair colours of students in class 6R. Draw a pictogram to represent this data. Let’s do this together step by step. BlackBrownFairGinger

Producing Pictograms - Example First find a suitable picture and key value… Simple picture – a round face (relating to head/hair) ‘Brown’ has highest frequency with 20. Setting the key value at 2 would involve 10 pictures! Let’s set the key value at 4. BlackBrownFairGinger

Producing Pictograms - Example Now let’s work out how many pictures we need for each hair colour... Black = 2 ÷ 4 = ½ Brown = 20 ÷ 4 = 5 Fair = 10 ÷ 4 = 2½ Ginger = 1 ÷ 4 = ¼ BlackBrownFairGinger

Producing Pictograms - Example Now let’s draw the pictogram… KEY: = 4 children BlackBrownFairGinger ½ picture5 pictures2½ pictures¼ picture Black Brown Fair Ginger

What’s wrong? Here is an example of a pictogram. How could it be improved? KEY: represents 4 windows FRI SAT SUN

What’s wrong? (cont’d) The pictures should all line up so Sat & Sun need bringing in line. Part pictures should also start on the left and work to the right. KEY: represents 4 windows FRI SAT SUN

Interpreting Pictograms Let’s use our previous example… How many windows were sold each day? How many windows were sold at the weekend? KEY: represents 4 windows FRI SAT SUN 3 x 4 = x 4 = 6 2 x 4 = 8 Weekend = Sat & Sun = = 14

What next? Print out and read through the notes called Data4. Work through the FIRST page of the MyMaths lesson called Pictograms and Bar Charts which can be found at: OR Work through the Pictograms page of the KS3 Bitesize lesson which can be found at: Now complete the two tasks in the Data4 notes. Save and complete the following worksheets: Picto1.xlsx, Picto2.xlsx and PictoUse1.xlsx Move on to the Data-5 powerpoint