Question

Determine whether the given linear equations are parallel, perpendicular, or neither.

Y = 1/9x+8
y=-9x +11
A. Perpendicular
B. Neither
C. Not enough information to determine
D. Parallel

Answer 1

A. Perpendicular

Explanation:

Lines are perpendicular if their slopes are opposite reciprocals of each other. Opposite, meaning if positive, the other slope is negative, and if negative, the other slope is positive. Reciprocal meaning, the number is flipped upside down, turning fractions into whole numbers and vice versa.

1/9

-1/9

-9

The slopes are perpendicular