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Magnitude of a Vector

CLMECH-PJQA4X

What are the $x$- and $y$-components of vector $\vec { T } = 7\hat { j } -4\hat { i }$?

A

The $x$-component is 7 and the $y$-component is 4.

B

The $x$-component is 4 and the $y$-component is 7.

C

The $x$-component is 7 and the $y$-component is -4.

D

The $x$-component is -4 and the $y$-component is 7.