Question

Find the distance between the points (1,5) and (1, -4)​

Answer 1

d = 9

Explanation:

The joining the two points is shown in the graph below.

The distance from (1, 5) to (1, -4) is

d = 5 – (-4)

= 5 + 4

= 9

Answer 2

The distance = 9 units

Explanation:

The formula of a distance between two points:

`d=√((x_2-x_1)^2+(y_2-y_1)^2)`

We have the points (1, 5) and (1, -4). Substitute:

`d=√((1-1)^2+(-4-5)^2)=√(0^2+(-9)^2)=√(81)=9`