Answer:
3 units
Explanation:
Since the y- coordinates are both 6 , then this is a horizontal line and the distance between the 2 points is the difference in the x- coordinates , that is
distance = | - 2 - 1 | = | - 3 | = 3
or
distance = | 1 - (- 2) | = | 1 + 2 | = | 3 | = 3