Warm-Up

Bar Graphs and Dot Plots 1.1

Objective Create and interpret bar graphs and dot plots

Bar Graph It uses the scale on the vertical axis to measure the height of each bar. useful when comparing data, easy to see the differences in categories.

Example 1: Comparing Colorado Mountains. Pikes Peak is 14,115 ft Mount Elbert is 14,440 ft Castle Peak is 14,279 ft Treasure Mountain is 13,535 ft Longs Peak is 14,259 ft

Example 1:Cont What is the tallest mountain? What is the lowest? What is the difference in hight between the two?

Vocab The greatest # in the set is the Maximum The lowest # in the set is the Minimum The difference between the Max and the Min is called the Range.  Range = Max - Min (simply subtract)

Example What is the minimum sales? What is the maximum sales? What is the range?

Example How many students had a birthday in July? Which month did 7 students have birthdays?

You try! Below is data showing student’s favorite classes. Build a bar graph displaying the data. ClassMathEnglishHistoryScience # of Students 61085

Moving on…

Pictograph A graph that uses pictures or symbols to represent data. How many Golden Delicious apples are there?

You Try! Jessica brought snacks for her friends today. She brought 5 fruit roll-ups, 3 bags of chips and 4 cans of Coke. Create a Pictograph displaying the snacks she brought.

Easy! Moving on again

Dot Plot A dot plot is similar to a pictograph except we use dots instead of pictures.

Example How many siblings do you have? For each person, we will add a dot to the number line. ______ students have 2 siblings. ______ have more than 3 siblings.

Homework 1.1 Worksheet All Problems