Page 185 - Math Course 3 (Book 2)
P. 185

Understanding Stem-and-Leaf Plots





                Step 2
                Draw a vertical line and write the stems 2 and 3 to   Your Turn!
                the left of the line.
                                                                  Real World Example
                Step 3                                             SPEED
                Write the leaves to the right of the line, with the   Display the following speeds given in miles per
                corresponding stem. For example, for 2400, write 4   hour in a stem-and-leaf plot.
                to the right of 2.
                                                                   65  72  59  68  75  70  68  64  67  69  72  55
                  Stem Leaf

                      2 4 8 8 4 9 2 9 6                            A.   Stem Leaf
                      3 0                                                   6 5 8 8 4 7 9


                Step 4                                                      7 2 5 0 2
                Rearrange the leaves so they are ordered from               5 9 5
                least to greatest. Then include a key or an                 6|4 = 64 mph
                explanation.
                                                                   B.   Stem Leaf
                  Stem Leaf
                                                                            5 5 9
                      2 2 4 4 6 8 8 9 9
                                                                            6 4 5 7 8 8 9
                      3 0
                                                                            7 0 2 2 5
                                         The key tells what
                 2|4 = 2400 lb             the stems and                    6|4 = 64 mph
                                          leaves represent.        C.
                                                                        Stem Leaf

                                                                            5 5 9
                                  Stem Leaf
                                                                            6 4 5 7 8 9
                                     2 2 4 4 6 8 8 9 9
                    Answer                                                  7 0  2 5
                                     3 0                                    6|4 = 64 mph


                                       2|4 = 2400 lb               C.   Stem Leaf

                                                                            6 4 5 7 8 9
                                                                            7 0 5 0 2

                                                                            5 9 5
                                                                            6|4 = 64 mph


                                                                     Answer



















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