A line passes through the point (1,P). Is the slope of this line>0?
1) Point (p, 13) lies on the line
2) Ponts (0, 1) lies on the line
1) Point (p, 13) lies on the line
2) Ponts (0, 1) lies on the line
P could be positive or negative.
A: Possible points
(1, P) (P, 13) - P is positive
(1, -P) (-P 13) - P is negative
Slope - Y2 -Y1/X2 - X1
1st case - 13 - P/ P - 1 if P =1 , then slope is infinity
If P>1 and less than 13 , then slope is positive
if P> 1 and greater than 13 , then the slope is negative.
Doing the same approximation for second set of points is not required, since we cannot answer the question using A.
Possible correction answers : B C E
B : Possible points
(1, P) (0,1)
(1 -P) (0,1)
1st case slope - 1-P/0-1 .. If P =1 , then Slope = 0
if P >1, then slope is negative
Again, approximation for second case is not required since using B we cannot answer the question
Possible answers - C, E
If we use both A, B
Then Line passes through, (1,P), (P,13) and (0,1)
Again depending on whether P is positive or negative, Slope could be positive/negative or 0
Hence Answer is E
Please post the OA
