Answer:
No
Step-by-step explanation:
Collinear is if points are on the same line.
2 points are not collinear, as they form a line.
If 3 points were on the same line, then it would be considered collinear.
4(8) - 3 • 81
The first one
Answer:
We calculate the slop of a line.
How to find the slope:
Pick any two points on a graph
The formula of slope is 
For example we have two points that contains the coordinates (5,2) (7,4)
Inserting them to the formula would result in:

=
Our rate of change is rise 2, run 2.
No because a right triangle always has a right angle