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rewona [7]
3 years ago
8

Find the vertex: y= -4x^2-8x-7

Mathematics
1 answer:
Anuta_ua [19.1K]3 years ago
7 0
The vertex occurs a the point (4,-9) 
The easiest way to do this is to draw the graph, or create a table of test values. When you do this, you will see as you increase the value of X, the value of Y continue to shrink until u hit X=4. The graph starts to increase in. So you know that is the vertex. In general, all functions of the form ax^2 +bx + c will have only one vertex. So you can apply this method. 
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Could someone please help me with this
arsen [322]

Hey!

-------------------------------------------------

Point Slope Form: y - 7 = -5/2(x + 4)

Slope-intercept Form: y = mx + b

m = slope

b = y-intercept

We can automatically eliminate Option A and B because they are both written in point slope form when the questions asks for slope-intercept form.

We can also eliminate option C because the slope in the equation doesn't match the slope in the equation above.

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Answer:

y = -5/2x - 3

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Hope This Helped! Good Luck!

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