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Answer:
The answer to your question is - 8
Step-by-step explanation:
Data
(3 - 4) 2 * 5 + (4 - 1) 2/3
The order of operations is
1st Parenthesis
2nd Roots and exponents
3rd Multiplication and division
4rd Addition and subtraction
Following these rules
Parenthesis (-1) 2* 5 + (3) 2/3
Multiplication and division - 10 + (6/3)
- 10 + 2
Addition and subtraction - 8
The least-square regression line has a slope of:
m=(nΣxy-ΣyΣx)/(nΣx²-ΣxΣx)
and a y-intercept of:
b=(Σy-mΣx)/n
In this case: n=7, Σxy=4899, Σy=391, Σx=85, Σx²=1153 so
m=(7(4899)-391*85)/(7(1153)-85*85))=1058/846
b=(391*846-85*1058)/(7*846)=34408/846
So the line of best fit is:
y=(1058x+34408)/846 and if we approximated this as your answers see to have done....
y=1.25x+40.67
0.143 filling in 20 characters
It should be D, I did the math :)