Cartesian Coordinate System Section 1.1 Cartesian Coordinate System

The Real Numbers The real numbers can be ordered and represented in order on a number line -1.87 4.55 -3 -2 -1 0 1 2 3 4

Cartesian Coordinate System y-axis (x, y) x-axis

Cartesian Coordinate System Ex. Plot (4, 2) Ex. Plot (-2, 1) Ex. Plot (2, -3) (4, 2) (-2, 1) (2, -3)

Cartesian Coordinate System Quadrants… II I III IV

The Distance Formula

The Distance Formula Ex. Find the distance between (7, 5) and (-3, -2) 10

The Equation of a Circle A circle with center (h, k) and radius of length r can be expressed in the form: Ex. Find an equation of the circle with center at (4, 0) and radius of length 3