A coordinate grid is shown below: A coordinate grid from negative 2 to 0 to positive 2 is drawn. There are three grid lines between a whole unit on the grid. it a blank grid Part A: Which point represents the origin? (2 points) Part B: Starting from the origin, explain how to plot the following three points accurately: (1, −1) (−1, 1.25) (−2, fraction 3 over 4) (8 points)