Answer:
slope formula
Explanation:
1- Slope of DE:
Assume point D is (x1, y1) and point E is (x2, y2). To get the slope of DE, we will substitute with the given points in the following formula:
slope of DE = (y2-y1) / (x2-x1) = -2
1- Slope of AC:
Assume point A is (x1, y1) and point C is (x2, y2). To get the slope of AC, we will substitute with the given points in the following formula:
slope of AC = (y2-y1) / (x2-x1) = -2
3- Therefore, the easiest way to get the slope of any line is by using the slope formula.
4- Note that since the two slopes are equal, this means that the two lines are parallel.
Hope this helps :)
