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## MAP Recommended Practice

### Course: MAP Recommended Practice>Unit 47

Lesson 2: Bar graphs

# Reading bar graphs: dog bones

Sal reads and interprets bar graphs.

## Want to join the conversation?

• what do i do when i need help?? i can't unerderstand the qouitons? thank you
• When you can't understand the questions, try to find a video relating to your problem. Or, you can ask a question here and the community can help you out!
• why do we write zero down in our graphs if its nothing? If we want to know how many apples we have and we have nun than theirs no need to write zero down.
• You write ZERO to show that you know that are ZERO (0) apples. If you write nothing we won't know that you know.
Absence of answer is not always zero. Absence of answer (not writing) may mean that you don't know the answer.
When you write down 0 we'll know that you have the right answer for this question.

Let's have an example:
Let's plot a graph of Nobel prizes won by countries.
How many Nobel Prizes where won by Egyptians ?
If you leave it blank on the graph we'll assume that you DON'T know how many. Actually it's a "right" answer .. you honestly don't know. Absence of information.
If you write down 0 (zero) we'll think that you think Egyptians never won any Nobel Prize and it's wrong since 4 Egyptians have won the Nobel prize.
So, 0 is different from nothing,
• what kinds of uses could we make of a bar graph or graph besides the ones in this video
• All kinds of things. Really you could make a graph out of anything.
• IN khan will we eaver have to create bar grapghs
?\
• actually, yes we will. In different skills you will need to know this stuff.
• How can we use bar graphs and charts to make equations?
• Each bar on a graph can represent a number in an addition problem. The sum of the bars is equal to the total amount.
• At , what does category mean?
• a category is a collection of "objects" that are linked by "arrows".
• How do you use a bargraph
• what is 900x298
• okay, so you need to multiply 9 x 298 on paper. you will see it is 2682. now add on two 0s because there were 2 in the equation. hope this helped :)