Question

Use the following information: a vertex is located at (4, 1) and the focus is located at (4, 3).

Find the directix of the equation:
Select one:
a. y = 2
b. y = 1
c. y = –1
d. y = 0

Answer 1

i'll have to double check but i think the directrix is same distance behind the vertex as focus is in front of vertex
that would make it y = -1

Answer 2

Thank you! I appreciate the explination I hate when people only give the answer sometimes

Answer 3

thats ok - but let me check it out first

Answer 4

yes thats correct