butt1409 wrote:
Nishan wrote:
The answer is D. There isn't enough info to find r. If were given another point on the line we could have found out r by using the value of the slope.
Why cant the answer be 6, mate?
We know that slope = 2 = Rise / Run
Since, Point (3,r) as 3 Run and r Rise, we can write, r/3 = 2
=> r = 6
Hence A!
What do you think?
r = 6 is
one possible value of r
In order for r to equal 6, it must be the case that the line passes through the origin (0, 0)
In this case, the slope between (0, 0) and (3, 6) is 2
If r = 6, then Quantity A is greater
Now let's see what happens if the line does
not pass through the origin
Let's say the line passes through the point (0, -6)
In this case, we need the slope from (0, -6) to (3, r) to be 2
Slope = (r - -6)/(3 - 0) = 2
Simplify: (r + 6)/3 = 2
Solve: r = 0
If r = 0, then Quantity B is greater
Answer: D