Making a Line Plot Collect data and put in chronological order Determine a scale and intervals If you have a small range, you should probably use intervals of 1 With larger scales, it is best to mark intervals every 2, 5, or 10 numbers. Ex. Scores on a math test Use a scale from 60 to 100 and intervals of 5 Ex. Scores on a math test

Making a Line Plot Draw a horizontal line and mark the intervals Ex. Scores on a math test

Making a Line Plot Mark an X above the number for each data point If a number is repeated, place one X above the other Ex. Scores on a math test X XX X XX X X X X X X XX X X X XX XXXX X

Making a Line Plot Count the number of data points and count the number of X’s to make sure you plotted each point! Ex. Scores on a math test X XX X XX X X X X X X XX X X X XX XXXX X 22 data points 22 X’s

Reading a Line Plot Understand the scale and interval Ex. This line plot has intervals of 2, so an X that falls between numbers would represent the median of those numbers. An X between the 6 and 8 would represent “7” XXX X XX X X X X X XX

Reading a Line Plot Finding the Minimum Minimum – smallest value XXX X XX X X X X X XX The minimum is the number represented by the first X 1 Do NOT just look at the numbers on the scale. The Minimum is NOT 0 The MINIMUM is 1

Reading a Line Plot Finding the Maximum Maximum – greatest value XXX X XX X X X X X XX The maximum is the number represented by the last X 15 Do NOT just look at the numbers on the scale. The Maximum is NOT 16 The MAXIMUM is 15

Reading a Line Plot Answering Questions 1.What is difference between the greatest number and the smallest number? 2.What is the combined total of the three smallest numbers? XXX X XX X X X X X X X

Reading a Line Plot Answering Questions 1.What is difference between the greatest number and the smallest number? XXX X XX X X X X X X X Greatest Smallest = 14

Reading a Line Plot Answering Questions 2. What is the combined total of the three smallest numbers? XXX X XX X X X X X X X The three smallest Numbers = 11