To determine the distance between two points on the coordinate system you can use the following formula, which is derived from the Pythagorean theorem:
Where
(x₁,y₁) are the coordinates of one of the endpoints of the line
(x₂,y₂) are the coordinates of the second endpoint of the line
Using C(8,-3) as (x₂,y₂) and D(-9,-6) as (x₁,y₁), you can calculate the length of CD as follows:
The length of CD rounded to the nearest tenth is 17.3 units