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OpenStudy (anonymous):
Given that the focus of a parabola is located at (0, -6) and the vertex is (0, 1) what is the directrix of the parabola?
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OpenStudy (anonymous):
Help me pls
OpenStudy (campbell_st):
well the graph looks like |dw:1400183340045:dw| the distance between the focus and vertex is called the focal length, a. the dirextrix is located a units above the vertex... so whats the distance between the focus and vertex..?
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