25 02 21 LO to interpret bar charts

25. 02. 21 LO: to interpret bar charts by reading scales Warm up: Can you think of a number that: • Has a 3 in the tens column • Has 4 digits • The digits add up to 12 • The hundreds digit is more than the tens digit © Classroom Secrets Limited

What is each increment worth on these scales? 0 10 0 20 100 0 25 50 0 20 40

Introduction What is each increment worth on these scales? 0 2 4 6 8 10 12 14 16 18 20 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 35 40 45 50 0 4 8 12 16 20 24 28 32 36 40

We’ll be paying special attention to the scales on the y axis today. But first, what must we remember when displaying data in a bar chart?

1. 2. Look at the y axis: what is wrong with the first bar chart?

If you were to input this data into a chart, what intervals would you use on the y axis? Can you explain why? Colour of Cars Passing the School Silver 35 Red 40 Blue 55 Challenge: What else needs to be added to this chart? Silver Red Blue

We need to add titles to the axes and a main title so we know what the chart is showing us. 35 Red 40 Blue 55 Colour of Cars Passing the School 60 Number of Cars Silver 40 Challenge: 20 Do you think showing the bars in red is the best colour to use here? 0 Silver Red Colour Blue

Use the bar chart to answer the questions. Cake Sales How many cakes were sold on Monday? 60 45 What is the most cakes sold in one day? 30 15 0 Mon Tues Wed Thurs Fri On which day were the least amount of cakes sold? What are the intervals on the y axis?

Use the bar chart to answer the questions. How many cakes were sold on Monday? 45 Cake Sales 60 What is the most cakes sold in one day? 60 on Wednesday 45 30 15 0 Mon Tues Wed Thurs Fri What are the intervals on the y axis? 15 On which day were the least amount of cakes sold? Tuesday and Thursday

Use the table to fill in the missing information on the bar chart. Favourite season Number of Y 5 children Autumn 3 Spring 7 Summer 4 Winter 12 What scale would you use on the y axis? Does it matter if a number in the table isn’t on the scale?

Number of insects found. Hinge question: Days of the week How many insects were found on Thursday?

Your IP features some SATs questions today! Have a go and see if you can answer them!