Question

question 1 of 10

the distance from the green point on the parabola to the parabolas focus is 9. what is the distance from the green point to the directrix?

a. 18
b. 4.5
c. 9
d. 7.5

Explanation:

Apply the geometric definition of a parabola

$$ d(\text{Point}, \text{Focus}) = d(\text{Point}, \text{Directrix}) $$

Substitute the given distance

$$
LATEXBLOCK0
$$

Answer:

• A. 18
• B. 4.5
• C. 9 (Correct answer)
• D. 7.5