Bar Graphs with Intervals

Bar Graphs with Intervals

Multiple Select

Jaimie signed up for the cookie baking contest. She noticed that there were 5 other contestant. The other contestant baked 5, 7, 2, 5, 6. And Jaimie baked 6 cookies. What should you start to do?

Use the whiteboard to help you

• Calculate the range

• Draw the tally chart

• Draw the bar graph

• Draw intervals

• I don't now...🙁

​Answer:

​The first step is to calculate the range. The numbers were 5, 7, 2, 5, 6, 6.

​The formula for range is Biggest - Smallest = range.

​In this case: 7 - 2 = 5 (range)

​Answer:

​the biggest number 8 - the smallest number 1 = 7

​The next step:

​You should start off by choosing a good bar number. Usually you should pick some numbers like 3 - 7. But sometimes if the range number gets funky you can change it a tiny bit for example: 99 = 100

Then divide the range with your number of bars you picked.

​For example: 100 ÷ 4 = 5 (interval size)

Multiple Select

Which number seems like a good number of bars? there is 2 answers

• 4

• 5

• 1

• 100

• 10

Multiple Select

Which number seems like a good number of bars? there is 2 answers

• 3

• 2

• 9

• 6

• 0

​Next step!

​Draw the tally chart

​Information

​Draw a tally chart.

​Label the two titles at the top.

Start at the smallest number and add the interval size - 1

​then for the next row start at the number you ended with and + one to it

​repeat the process

Draw

Draw a tally chart for the question: Jaimie signed up for the cookie baking contest. She noticed that there were 5 other contestant. The other contestant baked 5, 7, 2, 5, 6. And Jaimie baked 6 cookies. What should you start to do?

Use the whiteboard to help you

​Use your information that you had and draw a bar graph

Draw

Draw your bar graph!

Jaimie signed up for the cookie baking contest. She noticed that there were 5 other contestant. The other contestant baked 5, 7, 2, 5, 6. And Jaimie baked 6 cookies. What should you start to do?

Use the whiteboard to help you

​Thank you!