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Problem Solving

Problem Solving. [Graphs]. By Irma Crespo 2010. Circle Graph. A group of students were asked to name their favorite subject in school. The circle graph shows the result of the survey. . How many percent like English? Science? . Which is the most favorite subject?.

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Problem Solving

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  1. Problem Solving [Graphs] By Irma Crespo 2010

  2. Circle Graph • A group of students were asked to name their favorite subject in school. The circle graph shows the result of the survey. • How many percent like English? Science? • Which is the most favorite subject? • Which is the least favorite subject? • If 45 students chose math as their favorite subject, how many students were surveyed?

  3. Bar Graph 60 45 30 40 30 15 20 0 15 Purple and Orange Green and Gray Navy and Gold Red and White • The results show a favorite color survey. • How many students were surveyed? • What percent of the students chose purple and orange?

  4. Line Graph (1) 6 5 4 Profit ($ million) 3 2 1 2002 2004 2006 2000 Year • What was the profit in 2000? • What was the profit in 2002? • By how much did the profit increase each year? • If the trend continues, what is good prediction of the profits in 2009?

  5. Line Graph (2) • The Lakeside Marina charges a $35 rental fee for a boat, in addition to charging $15 an hour for usage. The graph shows the total cost y and the hour x. • What is the slope? What does it mean? • What is the y-intercept? What does it mean? • What is the total cost for 1 hour rental? • What is total cost for 3 hours of rental?

  6. Scatter Plot 650 y 500 550 Visitors 500 450 400 x 0 1 2 3 4 5 6 Week • The graph shows the number of visitors at an art exhibit. • What week has the least number of visits? • What week has the most number of visits? • How many more people visited the art exhibit during the week with the most visitors than the week with the least visitors?

  7. Tips to Problem Solving • Look for a pattern. • Use a graph. • Use logical reasoning By Irma Crespo 2010

  8. Practice Worksheet Complete the practice worksheet. Work with a partner or on your own. Submit completed worksheet for grading. Solutions are discussed the next day.

  9. Main Resources • Day, et.al. (2009). Math Connects: Concepts, Skills, and Problem Solving. Section 9.2. Columbus:McGraw-Hill. • PowerPoint created by Irma Crespo. University of Michigan-Dearborn, School of Education. Winter 2010.

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