we have
This is the equation of the line in standard form
so
The graph is a straight line
we are going to proceed to verify the first two cases only
<u>case A)</u> It is a straight line joining the points , , and
Using a graphing tool
The three points are on the straight line
see the attached figure N
<u>case B)</u> It is a straight line joining the points , , and
Using a graphing tool
The three points are not in the straight line
see the attached figure N
therefore
<u>the answer is</u>
It is a straight line joining the points , , and