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3 years ago

Line goes through (8,-1) and has a slope of -3/4.

Mathematics

1 answer:

Vedmedyk [2.9K]3 years ago

3 0

Answer:

y= -3/4 x+5

Step-by-step explanation:

Set up y= -3/4 x+b. Plug in the coordinate and you get b=5. So, you get your answer. Hope it helps :)

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3 years ago

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iren [92.7K]

Answer:

New year Standard deviation = 2255.25

Step-by-step explanation:

Years: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003

New Year: 141 142 178 72 219 138 171 134 210 70

Memorial: 191 174 185 197 138 183 156 190 188 181

Formula:

$Mean = \displaystyle\frac{\text{Sum of all observation}}{\text{Total number of observations}}$

$S.D = \sqrt{\displaystyle\frac{\sum(x_i - \bar{x})^2}{n}}$

a) Mean = $\frac{1475}{10} = 147.5$

$S.D = \sqrt{\frac{42.25+ 30.25+ 930.25+5700.25+ 5112.25+ 90.25+ 552.25+ 182.25+ 3906.25+ 6006.25}{10}}\\= \sqrt{\frac{22552.5}{10} }\\= 2255.25$

b) The standard deviation of the memorial day will be less than the new years day because for memorial day, the data points are not varying as in case of new year. Basically, we can say the spread in case of new year is more as compared to memorial day. Hence, standard deviation of memorial year is less than the new years day.

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