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Lines, angles, and triangles · Question 1 of 10

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1

Lines, angles, and triangles · Difficulty 3/5ID 1bd4d7da

Line $p$ is defined by $2y + 18x = 9$ . Line $r$ is perpendicular to line $p$ in the $xy$ -plane. What is the slope of line $r$ ?

A

$-9$

B

$-\frac{1}{9}$

C

$\frac{1}{9}$

D

$9$

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