Answer:
18 units
Explanation:
since the y- coordinates are equal then the 2 points lie on a horizontal line and the distance (d) between them is the absolute value of the x- coordinates, that is
d = | - 4 - 14 | = | - 18 | = 18
or
d = | 14 - (- 4) | = | 14 + 4 | = 18 = 18