Geometry

Free Version

Upgrade subject to access all content

Easy

Dot Product Calculation: Vertical Component

GEOM-NELGB7

If we know vector $a=(4, -2)$ and vector $b$ is perpendicular to vector $a$ with a horizontal component of 2, what is the vertical component of $b$?

A

$8$

B

$-8$

C

$0$

D

$-4$