PSSA Math Review Lesson 32 Choosing a Graph

Standard E E Choose and/or explain the correct representation graph for a set of data.

Review – Main Concepts There are many ways to represent DATA There are many ways to represent DATA A BAR GRAPH is used to compare numbers and amounts. A BAR GRAPH is used to compare numbers and amounts. A CIRCLE GRAPH is used for comparing a part of the group to another part or to the whole. A CIRCLE GRAPH is used for comparing a part of the group to another part or to the whole. A LINE GRAPH is used for showing changes over time. A LINE GRAPH is used for showing changes over time. A STEM-AND-LEAF plot shows all of the individual items in a data set. A STEM-AND-LEAF plot shows all of the individual items in a data set.

Example 1 Cecil conducted a school survey about the lunch preferences of students. Of 100 students, he found that 42% preferred pizza, 28% preferred hamburgers, 20% preferred sandwiches, and 10% preferred hotdogs. Which graph would best display the data?

Example 1 Strategy Consider the type of data. Consider the type of data. The data include groups that are part of a whole. The graph should show how the groups compare to each other and to the total. The best choice is a _____________.

Example 1 - Answer CIRCLE GRAPH CIRCLE GRAPH

Example 2 The principal of Engel Middle School collected data on the amount of money each grade (5 th, 6 th, 7 th, and 8 th ) raised in a charity drive. Which choice would best display this information?

Example 2 – Strategy Consider the type of data. Consider the type of data. The principal wants to compare four quantities. The best choice is a __________.

Example 2 - Answer BAR GRAPH BAR GRAPH

Example 3 Ms. Yoon wants to organize the math test scores of all her students. Which type of display should she use?

Example 3 - Strategy Consider the type of data. Ms. Yoon wants to include each data point. The best choice is a ______________.

Example 3 - Answer STEM AND LEAF PLOT STEM AND LEAF PLOT

Example 4 Maya records the daily high temperature at her school for two week. Which display would best show this data?

Example 4 - Strategy Consider the type of data. Maya recorded the temperature each day for 2 weeks. She wants to show ho the temperature changes over time. The best choice is a _________________.

Example 4 - Answer LINE GRAPH LINE GRAPH

Sample Test Questions Use the following slides to create a fun review game for your students. Use the following slides to create a fun review game for your students. The answers are on the slides following the question slide. The answers are on the slides following the question slide.

Question 1 Frank surveys 50 people about their favorite sports. Which type of display should he use to present the number of people choosing each sport to the total number of people surveyed? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf plot

Question 1 A CIRCLE GRAPH is best used for comparing a part of the group to another part of to the whole. A CIRCLE GRAPH is best used for comparing a part of the group to another part of to the whole.

Question 2 A scientist heats a chemical and records the temperature every minute for an hour. Which type of display is best suited to showing these data? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf plot

Question 2 - Answer A LINE GRAPH is best for showing changes over time. A LINE GRAPH is best for showing changes over time.

Question 3 A museum curator collects data on the number of paintings in each room of the museum. Which display is best suited to showing these data? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf plot

Question 3 - Answer A STEM-and-LEAF PLOT shows all of the individual items in a data set.

Question 4 Mr. Daly has the results of the last science test. Which display can he use to organize all of the scores in his class? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf plot

Question 4 - Answer A STEM-AND-LEAF PLOT shows all of the individual items in a data set. A STEM-AND-LEAF PLOT shows all of the individual items in a data set.

Question 5 Which type of graph should Ted use to show the results of his survey of 100 students’ favorite television shows if he wants to compare the precents of the shows chosen? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf graph

Question 5 - Answer A CIRCLE GRAPH is used best for comparing a part of the group to another part or to the whole. A CIRCLE GRAPH is used best for comparing a part of the group to another part or to the whole.

Question 6 A company president wants to track profits for the first six months of the year. What type of display should she use? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf graph

Question 6 - Answer A LINE GRAPH is best for showing change over time. A LINE GRAPH is best for showing change over time.

Question 7 Liana wants to show what part of her total allowance she spends on clothes, entertainment, books,and other categories. Which display should she use? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf plot

Question 7 - Answer A CIRCLE GRAPH is best used for comparing a part of the group to another part or to the whole.

Question 8 A coach wants organize the scores of his team’s last 15 games. Which display should he use? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf plot

Question 8 - Answer A LINE GRAPH is best used for showing changes of a time. A LINE GRAPH is best used for showing changes of a time.

Question 9 Samantha wants to chart the daily price of a share of a corporation’s stock over a month. Which type of graph should she use? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf graph

Question 9 - Answer A LINE GRAPH is best used for showing changes over time. A LINE GRAPH is best used for showing changes over time.

Question 10 The personnel director at ABC Company collects information on how employees travel to work (bus, car, train, etc.). Which type of display should she use to present these data? A. Bar graph B. Circle graph C. Line graph D. Stem-and-leaf plot

Question 10 – Answer A BAR GRAPH is usually used to compare numbers or amounts. A BAR GRAPH is usually used to compare numbers or amounts.

Open Ended Question This data represents the number of hours that five students studied for a final exam. Kerry: 6 hoursLisa: 4 hours Nina: 5 hoursOlga: 2 hours Monica: 3 hours A. What type of graph would best display the data? B. Use what you know about choosing a graph to explain why your answer is correct. Use words and/or numbers in your explanation.