2. How many quadrants does a Rectangular Coordinate System have? A 2 C.6 B. 4 D. 8 3. Which among these mathematicians was the Cartesian Plane named after? A. Euclid C Blaise Pascal B. Pythagoras D. Rene Descartes 4. What do you call the vertical number line in the Cartesian plane? A. y-axis C. origin B. X-axis D. quadrant 5. For the coordinates of the point in quadrant IV. the x value and y value are always and respectively. A negative, positive C. positive, negative B. negative, negative D. positive, positive 6. The coordinates for the origin in the coordinate plane are C. (1,1) A. (0.1) D. (1,0) B. (0,0)​