Identify the x and y intercepts of the function y=2x+12

Mathematics

1 answer:

Virty [35]3 years ago

7 0

Answer:

x=6

y=2x+12

Step-by-step explanation:

y intercept =2x+12 Easy!

now just solve for x

subtract 2x from equation

add 2x to y so now you have -2x(y)=12

subtract y from both sides

-2x= -12y

divided by neg 2

x=6

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Answer:

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Step-by-step explanation:

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Help me find Sample variance and standard deviation

AnnZ [28]

First, find the mean. You'll need it to compute the variance.

$\bar x=\displaystyle\frac15\sum_{i=1}^5x_i=\dfrac{21+10+6+7+11}5=11$

The variance of the sample is then computed with the formula

$s^2=\displaystyle\dfrac1{5-1}\sum_{i=1}^5(\bar x-x_i)^2=\dfrac{(21-11)^2+\cdots+(11-11)^2}4=\dfrac{71}2=35.5$

The standard deviation is the square root of the variance, so

$s=\sqrt{35.5}\approx5.958$