Answer:
The distance = 9 units
Step-by-step explanation:
The formula of a distance between two points:
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
We have the points (1, 5) and (1, -4). Substitute:
[tex]d=\sqrt{(1-1)^2+(-4-5)^2}=\sqrt{0^2+(-9)^2}=\sqrt{81}=9[/tex]
