Unit 2 Day 1 The Coordinate Plane Essential Questions: What are the different pieces of a coordinate plane? How do you plot points on a coordinate plane?

Vocabulary Coordinate Plane: is formed by two lines that intersect at a right angle: x-axis: the horizontal axis on a coordinate plane y-axis: the vertical axis on a coordinate plane Origin: where the x-axis and y-axis intersect at (0 , 0) Ordered Pair: a point you plot on a coordinate plane in the form (x , y) Scatter Plot: a type of graph that is used to see trends in data and to make predictions by plotting points but not connecting them with a line

Scatterplots We could display the cost of flights between two cities for a week to see when fares tend to be the lowest. S M T W T F S

Weight Height 64 66 68 70 72 74 76 Height (inches) 72 70 71 69 73 66 Weight (pounds) 190 170 180 175 160 150 200 Height Weight 160 150 170 180 190 200 64 66 68 70 72 74 76 140

The Coordinate Plane y-axis origin x-axis Quadrant I (+ , +) -3 -2 -1 1 2 3 3 2 1 -1 -2 -3 y-axis origin x-axis Quadrant I (+ , +) Quadrant II (- , +) Quadrant III (- , -) Quadrant IV (+ , -)

Example 1: Give the ordered pair for the following points. Point A Point B Point C Point D Point E A E D B C Example 1: Give the ordered pair for the following points. (-3 , 2) (0 , 3) (5 , 5) (3 , 0) (-1 , -4)

Example 2: Without graphing, name the quadrant or axis location of each point. (2 , 1) (-3 , 0) (5 , -3) (-2 , -2) (0 , 4) (-2 , 3) -3 -2 -1 1 2 3 3 2 1 -1 -2 -3 Quadrant I (+ , +) Quadrant II (- , +) Quadrant III (- , -) Quadrant IV (+ , -) Quadrant I x-axis Quadrant IV Quadrant III y-axis Quadrant II

Example 3: Plot and label the points from example 2. C (5 , -3) D (-2 , -2) E (0 , 4) F (-2 , 3) F E A B D C

Summary Essential Questions: What are the different pieces of a coordinate plane? How do you plot points on a coordinate plane? Take 1 minute to write 2 sentences answering the essential questions.