Find the Vertex, Focus, Directrix, and Focal Width of the Parabola

question 76

Multiple Choice

Find the vertex, focus, directrix, and focal width of the parabola.
- $$y ^ { 2 } = - 12 x$$

• A) Vertex: \(( 0,0 )\); Focus: \(( 3,0 )\); Directrix: \(x = - 3\); Focal width: 3
• B) Vertex: \(( 0,0 )\); Focus: \(( - 3,0 )\); Directrix: \(y = 3\); Focal wid th: 48
• C) Vertex: \(( 0,0 )\); Focus: \(( 0 , - 3 )\); Directrix: \(y = 3\); Focal width: 48
• D) Vertex: \(( 0,0 )\); Focus: \(( - 3,0 )\); Directrix: \(x = 3\); Focal width: 12

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Definitions:

Oxytocin

A hormone and neurotransmitter involved in childbirth and lactation, also known to play a role in social bonding, sexual reproduction, and during and after childbirth.

MEG

Stands for Magnetoencephalography, a non-invasive imaging technique used to measure the magnetic fields produced by neural activity in the brain.

Magnetic Fields

Invisible force fields created by electric currents that attract or repel magnetic materials.

Electrical Activity

The movement of electrical charges or signals, which is fundamental to the functioning processes in the nervous system and muscles.