**5079** users searched for this homework answer last month and **52** are doing it now, let’s get your homework done.

This **Top Homework Answer** is **Middle School** level and belongs to the **Mathematics** subject.

This answer got **55** “Big Thanks” from other students from places like **Arlington** or **Benedict**.

## Question

Derive the equation of the parabola with a focus at (2, 4) and a directrix of y = 8. a. f(x) = -1/8 (x – 2)2 + 6 b. f(x) = 1/8 (x – 2)2 + 6 c. f(x) = -1/8 (x + 2)2 + 8 d. f(x) = 1/8 (x + 2)2 + 8

## Answer

In this problem, given the focus at (2,4) and directrix at y = 8. then it is implied that the parabola is facing downwards. The vertex hence is at the middle of the focus and the directrix, hence at (2, 6). The general formula of the parabola is y-k = -4a ( x-h)^2. Substituting, y -6 = -1/8 *(x-2)^2. Answer is A.

## Students are also searching for

- under what conditions would you take samples of vomitus, sputum and serum creatinine?
- from the passage, the reader can conclude that cecily
- the matured ovary of a plant is a

If you have more homework to do you can use the search bar to find the answer to other homework: **300** have done it today and **149** in the last hour.

Help your mates do their homework and share **Top Homework Answers** with them, it’s completely free and easy to use!