 Grid – A pattern of horizontal and vertical lines, usually forming squares.

What are the coordinates for the house? A B C D E ,B When we are listing coordinates; we always state the horizontal coordinate first.

What are the coordinates for the house? (4,5) State the horizontal coordinate first, followed by the vertical coordinate

What are the coordinates for the house? (0,0) This point is also known as the origin

 x axis – a horizontal number line on a coordinate grid x

 x likes to lie down horizontally x

 y axis – a vertical number line on a coordinate grid y

 y likes to stand upright or vertically y

 Coordinates – an ordered pair of numbers that give the location of a point on a grid (3,4)

 The first number is always the x.x.  The second number is always the y (3,4)

 Step 1 – Always find the x value first, by moving horizontally (2, 3)y x

 Step 2 – Starting from your new position find the y value by moving vertically (2, 3) y x

 Step 1 – Find how far over horizontally the point is by counting along the x axis (5, ) y x

 Step 2 – Now count how far vertically the point is by counting along the y axis (5,4) y x

(3,5) y x

(2,6) y x

(4,0) y x

(0,5) y x

(1,1) y x

 When number lines are extended into the negative number lines you add 3 more quadrants to the coordinate grid y x

 If the x is negative you move to the left of the x = -2 y x

 If the y is negative you move down below the zero y = -3 y x

 Step 1 - Plot the x number first moving to the left when the number is negative (-3, -2) y x

 Step 2 - Plot the y number moving from your new position down 2 when the number is negative (-3, -2) y x

 When x is positive and y is negative, plot the coordinate in this manner (2, -2) y x

 When x is negative and y is positive, plot the coordinate in this manner (-2, 2) y x

(-3, -3) y x

(-1, 2) y x

(1, -1) y x

(2, -2) y x

(-3, -2) y x

Ex 12A