Ch 8 HW Questions Q1 [111] Q2 [111] Q 3 [1/1] Q 4 [111] Q 6 [1 /1] Q7[111] Q8 [1

Question

Ch 8 HW Questions Q1 [111] Q2 [111] Q 3 [1/1] Q 4 [111] Q 6 [1 /1] Q7[111] Q8 [111] Q 9 [1/1] Q 10 [1/1] Q 15 [111] C Q 16 (0.8/1) BRITTANIE MASH WORTH Show Intro/Instructions Find the focus, directrix, focal diameter, vertex and axis of symmetry for the parabola 8.72r Focus 2.18,0) Preview Directrix 2.18 Preview Focal diameter 2- -2.18 Preview Vertex 0,0) Preview Axis of symmetry y 0 Preview Be sure to enter each answer in the appropriate format. Hint: What is the appropriate notation for a line or a point? Get help: Video License Points possible: 1 Unlimited attempts. Score on last attempt: (0.2, 0.2, 0, 0.2, 0.2), Score in gradebook: (0.2, 0.2, 0, 0.2, 0.2), out of: (0.2, 0.2, 0.2, 0.2,

Explanation / Answer

You are doing a mistake here because focal daimeter is a length and it can't be negative. So, y2 can't be negative.

So given equation of parabola -------

y2 = -8.72 x

By comparing with y2 = -4ax which have focal diameter = 4a

So here --- -4a = -8.72

4a = 8.72

So, focal diameter is 8.72.

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