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3 years ago

14

Suppose that the final exam scores of all statistics students at a nearby college are collected and are found to have mean 82.6,

with a standard deviation of 7.5 percentage points. Interpret the value of the standard deviation.

1 answer:

ale4655 [162]3 years ago

6 0

the data points are 7.5 points away from the mean 82.6

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The image shows a geometric representation of the function f(x) = x2 – 2x – 6 written in standard form. An algebra tile configur

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Answer:

$f(x)=(x-1)^2-7$

Step-by-step explanation:

Standard form:

$f(x)=x^2-2x-6$

Vertex form:

$y=(x-h)^2+k$

(h, k) is the vertex

x is the coordinate of the vertex

To find x use the formula:

$x=\frac{-h}{2a}$

$f(x)=x^2-2x-6$

a=1

b=-2

c=-6

Substitute:

$x=\frac{-(-2)}{2(1)}=1$

Substitute x in equation:

$f(x)=1^2-2(1)-6\\f(x)=1-2-6\\f(x)=-7$

h=1

k=-7

Substitute h, and k into the vertex formula:

$f(x)=(x-1)^2-7$

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Answer:

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