Warm Up

Two-Variable Data – 1.6

Definitions

• One-variable data : A data set that measures only one trait.

Ex: Age

• Two-Variable Data: Measures two traits, often trying to see the relationship.

Ex: Age and Height.

Coordinate Plane

Quadrant IQuadrant II

Quadrant III Quadrant IV

(x,y)

• Called an “ordered pair”• X is ALWAYS first!• X is the horizontal distance from (0,0) and y is

the vertical distance from (0,0).• (0,0) is called the orgin

Quadrant IQuadrant II

Quadrant III Quadrant IV

Origin

Example 1

• Plot the points, and label with its corresponding letter.

• A(1,3)• B(-4,2)• C(-3,-1)• D(4,-2)

Rule

(+,+)(-,+)

(-,-) (+,-)

Example 2

• Name the Quadrant location of the following points

• (1,3)• (10, -21)• (-42,-34)• (-5,6)

Example 3

What if the point has a 0?

(1,0)

Or

(0,1)

Homework

• 1.6 All problems