Name: SAT Math Help & School Math Mastery
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#11441

linear equations

systems

hard

75 sec

$3 x + 4 y = 1$ and $a x + b y = 1$
In the given pair of equations, $a$ and $b$ are constants. The graph of this pair of equations in the $x y$ -plane is a pair of perpendicular lines. Which of the following pairs of equations also represents a pair of perpendicular lines?

A.

$3 x + 8 y = 1$ and $a x + b y = 1$

B.

$6 x + 8 y = 1$ and $2 a x + b y = 1$

C.

$3 x + 8 y = 1$ and $2 a x + b y = 1$

D.

$3 x + 4 y = 1$ and $2 a x + b y = 1$