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.

part a: which point represents the origin? (2 points)

part b: starting from the origin, explain how to plot the following three points accurately:

(2, −2)
(−2, 1.5)
(−1, fraction 2 over 4)