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olga_2 [115]
4 years ago
9

What is the equation of the directrix of the parabola given by the equation (y − 3)2 = 8(x − 5)?

Mathematics
1 answer:
Licemer1 [7]4 years ago
8 0
The vertex of the parabola is at (5,3) and its focal length is 8/4 = 2.
Since it opens to the right, the directrix will be a vertical line 2 units to the left of the vertex, so its equation will be x=(5-2), or x=3
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Step-by-step explanation:

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average rate of change

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To calculate the average rate of change between the 2 points use.

∣

∣

∣

∣

∣

¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

a

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(

b

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a

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and

f

(

4

)

=

4

2

−

6

(

4

)

+

8

=

0

The average rate of change between (4 ,0) and (9 ,35) is

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−

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