Tulkin987 wrote:

Bunuel wrote:

Line A is represented by the line y = 3x − 4. Which of the following represents the equation of a line that is perpendicular to Line A and that travels through point (1,2)?

A. y = −3x + 4

B. y = −x/3 + 4/3

C. y = −3x + 3/4

D. y = −x/3 + 7/3

E. y = −x/3 − 4

Don't need to recall the formulae for perpendicular lines. Just test the answer choices whether they travel through point \((1,2)\).

After checking, we can find out that only \(y = −x/3 + 7/3\) travels through point \((1,2)\).

Answer: DHi,

Remembering the formula, one can easily to crossout A and C, this can save some time. And what if it were a 700 GMAT question and test makers would throw to you a bunch of options which include (1,2)? Try to leverage all assets in given questions.

P.S. I have no doubt that you remember the formula, yet I was trying to stress the right attitude, which will gain you another 30-40 points on your exam.