An Equation of the Form $y ^ { 2 } = 4 p x$

question 50

Multiple Choice

An equation of the form $y ^ { 2 } = 4 p x$ is given. Write equations for the directrix and axis of symmetry.
- $$y ^ { 2 } = - 7 x$$

• A) directrix: \(x = - \frac { 7 } { 4 } ;\) axis of symmetry: \(y = 0\)
• B) directrix: \(x = - \frac { 7 } { 4 } ;\) axis of symmetry: \(x = 0\)
• C) directrix: \(x = \frac { 7 } { 4 }\); axis of symmetry: \(x = 0\)
• D) directrix: \(x = \frac { 7 } { 4 }\); axis of symmetry: \(y = 0\)

---

Definitions:

Target Profit

The desired level of financial gain set by a business for a specific period, guiding pricing strategies and operational decisions.

Monthly Fixed Expense

Expenses that do not change month to month, regardless of business activity, such as rent or salaries.

Contribution Margin Ratio

The proportion of sales revenue that exceeds variable costs, represented as a percentage.

Fixed Monthly Expenses

Costs that do not vary from month to month, such as rent, insurance, and salaries.