Transcript Coordinate Graph

Position on a Coordinate Graph:
Ordered Pair
2 April 2016
Coordinate Graph
• Visual method of showing relationship
between numbers
• Coordinate graphs can be used to give
________ like a ______, OR to show
relationships like ________traveled over time
• Coordinate graphs can be used to give
LOCATION like a POINT, OR to show
relationships like DISTANCE traveled over
time
y-axis
• Vertical axis
• A number line labeled going up or down
x-axis
• Horizontal axis
• A number line labeled going left or right
Origin
Origin: where x-axis
and y-axis intersect
Ordered Pair
• Are numbers used to locate a point in the graph
• Number on the x-axis is called x-coordinate
• Number on the y-axis is called y-coordinate
Ordered Pair
The first
number is the
x-coordinate
(6,2)
(x,y)
The second
number is the
y-coordinate
Example: Point A
x-coordinate: 3
y-coordinate: 2
Ordered Pair is: (3,2)
Origin
Linear Relationship
• If the data points in the graph forms a line
Non-linear Relationship
• If the data points do not form a line
Line of Best Fit
• Definition - A Line of Best is a straight line on a
Scatterplot that comes closest to all of the dots
on the graph.
• A Line of Best Fit does not touch all of the dots.
• A Line of Best Fit is useful because it allows us
to:
▫ Understand the type and strength of the relationship
between two sets of data
▫ Predict missing Y values for given X values, or missing
X values for given Y values
Line of Best Fit
Data Set
Sample
Mass (g)
Volume (m3)
1
2
1
5
0.14
0.70
3
4
5
6
7
10
15
20
25
30
1.40
2.10
2.80
3.50
4.20