3. What do you call the horizontal number line in the Cartesian plane? A. X-axis C. origin B. y-axis D. quadrant 4. When plotting the point (-8,1), which describes the movement along the x-axis and y- axis in the correct order? A. 8 units right then 1 unit up B. 8 units down then 1 unit left C. 8 units left then 1 unit up D. 8 units up then 1 unit right