12111 4" What value of x is in the solution set of 9(2x + 1) < 9x – 18?
1 answer:
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Answer:
The area of the circle is 1017.36 cm².
Step-by-step explanation:
36 / 2 = 18
r = 18
A = r²
18²* = 1017.36
Answer:
a)
And in order to calculate the correlation coefficient we can use this formula:
b)
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
c) The coefficient of variation is given by:
And we can conclude that 67.4% of the variation in y can be explainedby the corresponding variation in x and the least-squares line
d) For this case we just need to replade x = 34 into our model and we got:
Step-by-step explanation:
For this case we have the following data:
x 13 34 52 28 50 25
y 1 4 5 5 9 3
Part a
And in order to calculate the correlation coefficient we can use this formula:
Part b
Where:
With these we can find the sums:
And the slope would be:
Nowe we can find the means for x and y like this:
And we can find the intercept using this:
So the line would be given by:
Part c
The coefficient of variation is given by:
And we can conclude that 67.4% of the variation in y can be explainedby the corresponding variation in x and the least-squares line
Part d
For this case we just need to replade x = 34 into our model and we got: