A Model of the Form $y ^ { 2 } = 4 p x$

question 107

Multiple Choice

A model of the form $y ^ { 2 } = 4 p x$ is given. Identify the focus, and write an equation for the directrix.
- $$y ^ { 2 } = - 3 x$$

• A) focus: \(\left( - \frac { 3 } { 4 } , 0 \right)\); directrix: \(x = \frac { 3 } { 4 }\)
• B) focus: \(\left( 0 , \frac { 3 } { 4 } \right)\); directrix: \(y = - \frac { 3 } { 4 }\)
• C) focus: \(\left( - \frac { 3 } { 4 } , 0 \right) ;\) directrix: \(x = - \frac { 3 } { 4 }\)
• D) focus: \(\left( 0 , - \frac { 3 } { 4 } \right) ;\) directrix: \(y = \frac { 3 } { 4 }\)

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Definitions:

Normal Balance

The side (debit or credit) of an account on which increases to the account are recorded under double-entry accounting.

Financial Statement

A formal record of the financial activities and position of a business, person, or other entity.

Permanent/Temporary

distinguishes between accounts or actions that exist indefinitely (permanent) or for a specific duration (temporary).

Closing Entries

Closing entries are journal entries made at the end of an accounting period to transfer temporary accounts to permanent accounts, preparing the books for the next period.