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SAT Math Practice Question #31496 - SATify | SATify

#31496

slopes

coordinate geometry

medium

60 sec

In the $x y$ -plane, line $M$ is a vertical line. Line $N$ is perpendicular to line $M$ . Which of the following statements must be true about the slope of line $N$ ?

A.

The slope of line $N$ is undefined.

B.

The slope of line $N$ is $0$ .

C.

The slope of line $N$ is positive.

D.

The slope of line $N$ is negative.