Question 206 Data Sufficiency 2019 GMAT Quantitative Review
Question 206 Data Sufficiency 2019 GMAT Quantitative Review
Video explanation[PQID: DS13097]: If $k$ and $l$ are lines in the xy-plane, us the slope of line…
Comments
Saurav Singhsays
When we consider statements 1 & 2 together; Is it not possible that the x-intercepts for line k is (3,0) and x-intercept for line l is (-3,0). Since both the lines intersect at positive y-axis, thus the slope of both the lines is same. It is just a fact that one of the slopes is positive and the other is negative.
When we talk about slopes, we have to take the sign into account. That means a line with a slope of $-2$ is less than that of a line with a slope of $+2$. Technically, the steepness is the same in both cases, meaning in one case we are going down, say on a roof, and in one we are going down at a certain angle and in the other we are going up at the same angle.
When we consider statements 1 & 2 together; Is it not possible that the x-intercepts for line k is (3,0) and x-intercept for line l is (-3,0). Since both the lines intersect at positive y-axis, thus the slope of both the lines is same. It is just a fact that one of the slopes is positive and the other is negative.
When we talk about slopes, we have to take the sign into account. That means a line with a slope of $-2$ is less than that of a line with a slope of $+2$. Technically, the steepness is the same in both cases, meaning in one case we are going down, say on a roof, and in one we are going down at a certain angle and in the other we are going up at the same angle.