# Graphs

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• Created by: Lotto65
• Created on: 14-06-16 18:44
When do you use a bar graph?
If you have a categoric independent variable and a continuous dependent variable
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When do you use a line graph?
If both variables are continuous data
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What is discrete data?
Data that can be arranged into categories e.g. eye colour
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What is continuous data?
Consists of numerical values
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Cent.... is how much of something?
100 lots of
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Kilo... is how much of something?
1000 lots of
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Mega... is how much of something?
1,000,000
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What must you do when drawing a graph?
Circle anomalies, draw line/ curve of best fit
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A graph shows a straight line that goes through the origin. What does this say about the variables?
They are directly proportional
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What does it mean if something is directly proportional?
As x increases, y increases
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A graph shows a straight line that does not go through the origin. What does it show about the variables?
There is a linear relationship
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A graph curves downwards and then along the x axis. What does this say about the variables?
Inversely proportional
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What is a non-linear relationship?
Not a straight line and not inversely proportional
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What word must you NEVER say in science in particular?
Correlation
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How do you work out the gradient of a curve?
Draw a tangent and calculate the gradient of the tangent
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If you have a curved velocity-time graph, how do you work out the distance?
Count the squares
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## Other cards in this set

### Card 2

#### Front

When do you use a line graph?

#### Back

If both variables are continuous data

### Card 3

#### Front

What is discrete data?

### Card 4

#### Front

What is continuous data?

### Card 5

#### Front

Cent.... is how much of something?