What is an equation of the line that passes through the point (4,-6) and had a slope of -3

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Correct answer brainliest asap an d 99 pointsss what are relative frequencies to the nearest hundredth of the columns of two way table column a 102, 18 colunm b 34, 14 answers choices 0.15 0.25 0.29 0.44 0.56 0.71 0.75 0.85

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals