Page 21 - STEPS MATHEMATICS 4A
P. 21

Bar-line graphs                                                       RM25 or 26




       Gordon  collected  data about the numbers of letters
       in  people's last names.

       He  made a  tally chart  ...                    ...  and then drew a  bar-line graph.

        A/uwbers                                     it,-,
        oj. Letters  TaJLUj         To^JL            24-

           a       1                  1            2   2.0.
                                                   S-
                                                   Q   18-
                                                   <v
           3       (/                 2            a.  ifc.
           i+     Illl-  Illl         10
                  til 1   III f                    i  u-
           5      m- -Hff 4W- -Htf   Jo            ?   10-

           (o     iftt-HH-Htt-HtMIII  ^f
           7      •W+-W-  II         12.
                                                      2-  — 1 ——— , — , — , — , — , — — r_
           fr     4tH-                5                0                                     .__J__J
                                                             X345fo7«9/o £»*•«
           9      mf                  5                               Mumber  c£  Letters           10
          /o      II                  a
        f*"»r«.t*ift.x
           IO     II                  a
                                                                    You  could  use  class  registers,
                                                                       or  the  telephone  book,
              What was the most common  length                        or  lists  qf/ootball teams.
              of name?

               How many people had  names
              with eight letters?


              Use  RM25 or RM26 to  make a  tally
              chart and a  bar-line graph to show
              the number of letters  in  the last name
              of about 80  people.  Choose a  scale
              for your bar-line graph.


              Write six facts.about your graph.
              Ask someone to check your facts.


          CHALLENGE

          Choose a  topic to collect data on.
          Draw a  tally chart and  a  bar-line graph to show your results.
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