The Story of a Graph Meeting (Interpreting and Drawing Graphs) Topic Students will be able to match graphs with real-life scenarios, determine their own real-life scenarios for given graphs and create graph challenges for friends. Materials Needed ♦♦ Copies of the Match the Graphs and Stories Sheet (downloaded from www.mathcounts.org) ♦♦ Copies of the Create Your Own Graphs and Stories Sheet (downloaded from www.mathcounts.org) ♦♦ Copies of the Create the Stories for the Graphs Sheet (downloaded from www.mathcounts.org) Meeting Plan Match the Graphs and Stories Sheet For the following graphs, (1) match each graph on the left with a reasonable scenario on the right and (2) supply a reasonable label for each axis of each graph. A 1 A car leaves a rest stop only to be stuck in stand-still traffic a few miles down the road B 2 The daily profit from a movie theater over a two-week period C 3 The position of a high school classroom door from 30 min before school starts to the end of 3rd period D 4 Membership at a gym costs $60 per month in addition to an initial payment of $30 E 5 A frog’s distance from the ground as he is jumping A - ___ B - ___ C - ___ D - ___ E - ___ Create Your Own Graphs and Stories Sheet Create four different story graphs on the left side. On the right side, provide the accompanying story for each graph, but not in any particular order. Swap papers with another group, and see if the other group (1) can match each of the graphs on the left to the correct scenario on the right and (2) provide a reasonable label for each axis of each graph. A 1 B 2 C 3 D 4 Phase I: Students match representations with real-world scenarios. Using the Match the Graphs and Stories Sheet, students are asked to match each of the five graphs with one of the five given scenarios. One example is shown to the right. Once a match is made, students are then asked to label each axis of each graph. If students have only seen graphs representing y = mx + b, it may be difficult at first for them to get out of that mindset. Perhaps form groups of three or four students to work together to complete this first challenge. Profit (Dollars) For this meeting plan, students are taken through three different challenges that allow them to see a graph as something more than a straight line representing y = mx + b. Instead, graphs for this meeting plan are meant to represent real-world situations with which students are familiar. M T W T F S S M T W T F S S Days The daily profit from a movie theater over a two-week period Phase II: Students create their own real-world scenarios and representations. Students can work in groups to create a challenge similar to what was given to them in Phase I. Students will come up with four real-world scenarios and their representations. Once each group has finished creating its challenge, groups can swap to see if they can complete each other’s challenges. (You may wish to make photocopies of each challenge before having another group solve the challenge, so you can have a clean copy to keep.) Once students have worked through each other’s challenges, they can provide feedback to the original group members to let them know if there were problems with the representations or other things to consider. Create the Stories for the Graphs Sheet A - ___ B - ___ C - ___ D - ___ Phase III: Students create real-world scenarios for given representations. Using the Create the Stories for the Graphs Sheet, students are challenged to come up with real-world scenarios that match given representations. This could be turned into a fun game between groups. The club could vote on the scenario they like best for each representation. Points could be earned for creativity, as well as accuracy. 2012–2013 MATHCOUNTS Club Resource Guide For each of the following graphs, (1) write a reasonable scenario for each one and (2) supply the labels for each axis of each graph. A A B B C C D D E E 35 Match the Graphs and Stories Sheet For the following graphs, (1) match each graph on the left with a reasonable scenario on the right and (2) supply a reasonable label for each axis of each graph. A 1 A car leaves a rest stop only to be stuck in stand-still traffic a few miles down the road B 2 The daily profit from a movie theater over a two-week period C 3 The position of a high school classroom door from 30 min before school starts to the end of 3rd period D 4 Membership at a gym costs $60 per month in addition to an initial payment of $30 E 5 A frog’s distance from the ground as he is jumping A - ___ B - ___ C - ___ D - ___ E - ___ ble Possi Key er Answ Match the Graphs and Stories Sheet A Speed (mph) For the following graphs, (1) match each graph on the left with a reasonable scenario on the right and (2) supply a reasonable label for each axis of each graph. 1 A car leaves a rest stop only to be stuck in stand-still traffic a few miles down the road 2 The daily profit from a movie theater over a two-week period 3 The position of a high school classroom door from 30 min before school starts to the end of 3rd period 4 Membership at a gym costs $60 per month in addition to an initial payment of $30 5 A frog’s distance from the ground as he is jumping B Height (cm) Time (minutes) C Degrees Open Time (seconds) D Total $ Paid Time (minutes) E Profit (Dollars) Time (Days) M T W T F S S M T W T F S S Days 1 A - ___ 5 B - ___ 3 C - ___ 4 D - ___ 2 E - ___ Create Your Own Graphs and Stories Sheet Create four different story graphs on the left side. On the right side, provide the accompanying story for each graph, but not in any particular order. Swap papers with another group, and see if the other group (1) can match each of the graphs on the left to the correct scenario on the right and (2) provide a reasonable label for each axis of each graph. A 1 B 2 C 3 D 4 A - ___ B - ___ C - ___ D - ___ Create the Stories for the Graphs Sheet For each of the following graphs, (1) write a reasonable scenario for each one and (2) supply the labels for each axis of each graph. A A B B C C D D E E
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