THE CARTESIAN COORDINATE SYSTEM
MATH-001Dr. Farhana Shaheen
THE CARTESIAN COORDINATE SYSTEM
We know that One dimensional numbers can be represented as points on a number line, and can be oriented either to the left (negative), or to the right (positive) of the origin (the zero point).
Cartesian coordinates are just the natural extension of the number line into two (or three) dimensions. In the two dimensional case, we just use two number lines (or "axes"), called the x axis and y axis, at right angles to each other.
CARTESIAN PLANES AND COORDINATES
QUADRANTS IN CARTESIAN PLANES
QUADRANTS
POINTS IN CARTESIAN PLANE
LINEAR EQUATIONS
GRAPH OF LINEAR EQUATIONS Y = AX+B
PARABOLA
EQUATION OF PARABOLA 2xyofGraph
2xy
GRAPH OF xyxy 2
DRAW THE PARABOLA
PARABOLAS WITH DIFFERENT SHAPES
PARABOLAS IN NATURE
PARABOLAS IN LIFE
PARABOLIC BUILDING
RELATIONS ARE SET OF ORDERED PAIRS
FUNCTIONS
Functions are relations, set of ordered pairs,
in which the first elements are not repeated.
For example: A= {(1, 3), (2, 5), (3, 4), (4, 7), (5,
2)} Note: B= {(1, 1), (2, -4), (2, 4), (3, 9), (3,
-9)} is NOT a Function. (Why?)
FUNCTIONS ARE SET OF ORDERED PAIRSWHERE X-COORDINATE IS NOT REPEATEDCHECK FOR FUNCTIONS:
EXAMPLE OF A FUNCTION (Y CAN BE REPEATED)
DOMAIN AND RANGE OF A FUNCTIONTHE DOMAIN IS ALL THE X-VALUES, AND THE RANGE IS ALL THE Y-VALUES.EXAMPLE: FIND THE DOMAIN AND RANGE.
DOMAIN AND RANGE OF A RELATION
State the domain and range of the following relation. Is the relation a function?
{(2, –3), (4, 6), (3, –1), (6, 6), (2, 3)} The above list of points, being a
relationship between certain x's and certain y's, is a relation.
Domain: {2, 3, 4, 6} Range: {–3, –1, 3, 6}
DOMAIN AND RANGE OF A FUNCTION
FUNCTIONS?
VERTICAL LINE TEST FOR GRAPH OF FUNCTIONS
CHECK FOR GRAPHS OF FUNCTIONS
GRAPHS OF FUNCTIONS?
EXAMPLE:
The set A= {(1, 1), (2, -4), (2, 4), (3, 9), (3, -
9)} is NOT a Function. These are the ordered pairs obtained from the equation
xyxy 2
FUNCTION IS AN INPUT/OUTPUT MACHINE
FUNCTION IS AN INPUT/OUTPUT MACHINE
THANK YOU
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