Answer:
Use the slope formula three times: once for the first pair of points, then for the second pair of points, then for one point from each pair. If all three slopes are the same, then all the points lie on the same line.
Step-by-step explanation:
Add this on as well for a better grade.
Use the slope formula three times.
If the slopes of both pairs are equal, then the lines may be parallel.
If all three slopes are equal, including the slope using one point from each pair,
then all the points coincide on the same line.
