Scatter Plots Flashcards
What is a hypothsis?
An educated guess
Indepenant Variable
The points on the X axis of a scatter plot. They exsist on their own and aren’t influenced by other factors
Example: Time, Year and Age
Dependent Variable
Points that are plotted on the Y axis of a scatter plot. They rely on other factors
Example: Mark Earned
Positive Correlation
When a scatterplot slants up to the right
Example: Hours You Study vs Your Mark
Negative Correlation
When a scatterplot moves down to the right
Example: Fitness Level vs Time To Run A Km
Strong Correlation
When the points on a scatterplot fall close to a straight line
No Correlation
When the points on a scatterplot show no pattern
Example: Height vs Hair Colour
What is a Line of Best Fit?
A line that is drawn to generalize the pattern in a graph and find unknown points. There must be a somewhat even number of points on all sides of the line.
Interpolating
A prediction based on data you have
Extrapolating
Predicting data outside of what you have
Discrete Data
Data that is counted
Example: Pizza Toppings
Continuous Data
Data that can be measured
Example: Time, Height, Weight
What is Curve of Best Fit?
When your data shows a curve
What 4 Things Must Your Scatter Plot Include?
1) Title
2) Labels
3) Accurate Points
4) Line of Best Fit
What is a Cooridinate Plane?
A Grid with 2 perpendicular axis
X axis= Horizontal
Y axis= Vertical
What is an Origin?
The point in the coordinate plane where the two lines cross marked 0,0
What is a Ordered Pair?
A pair of points marked with a letter
Example: A (1,3)
Graphing Using a Table Of Values:
A line can be represented by an equation. How do you use a table of values to determine all of your points?
Step 1) Choose your X values
Step 2) Write out your equations to find Y and replace the x variables with the values you chose
Step 3) Write your x and y coordinate pair
When there is a plus at the end of an equation followed by a number, what does this tell us?
Where the line crosses the y axis
