Presentation on theme: "Introduction to Finding Pythagoras"— Presentation transcript:
1Introduction to Finding Pythagoras Graphing with Coordinateson the Cartesian Plane
2Ancient Math Geek, Rene Descartes took a number line and ran it left to right and called it the x-axis.The smaller numbers are on the left of the number line and the higher numbers are to the right of the line.
3Ancient Math Geek, Rene Descartes then took a number line and ran it up and down and called it the y-axis.The smaller numbers are down the line and the higher numbers are up on the line.4321-1-2-3-4
4By the way, how many points are on my number line? There are an infinite number of points on any number line. Between each whole number are countless fractions and decimals. Also each line continues on to the right or up to infinity ∞ and to the left or down to negative infinity -∞ the line never stops.
5The Cartesian Plane: x & y -axis x-axisRemember too, the x-axis is for the INDEPENDENT variable & the y-axis is for the DEPENDENT variable.
6The Cartesian Plane: origin y-axisQuadrant IIQuadrant IOrigin (0,0)x-axisQuadrant IIIQuadrant IV
7You must walk before you can fly. CoordinatesRemember, when you give coordinates - or ordered pairs- you must give the x-coordinate and then the y-coordinate.You write them in parentheses with a comma in the middle.You must walk before you can fly.( , )(-5,7 )(x,y)