7th grade plans to raise double the 5th grade, 6th grade plans to raise 3/2 of 5th grade.
6th grade plans to raise 2/3 of 8th grade.
r value i.e Correlation between x value and y value = 0.769
=Standard deviation of the x-coordinate = 5.508
=Standard deviation of the y-coordinate = ?=k
Slope of line is given by formula
If slope of line is m, then
m =
m= ![0.769 \times \frac{k}{5.508}](https://tex.z-dn.net/?f=0.769%20%5Ctimes%20%5Cfrac%7Bk%7D%7B5.508%7D)
Substitute the value of k, i.e Standard deviation of the y-coordinate and then you can get the slope of line to three decimal places.
Answer:
B
Step-by-step explanation:
to build a triangle the sum of lengths of any and every pair of lines must be longer than the third line.
like in A we have
6+18>23 true
6+23>18 true
18+23>6 true
so, it is a triangle.
but in B we have
8+10<20
and therefore it cannot be a triangle (the endpoints cannot connect).
Subtract 16 to 9 and youll get n
13² = 169
8² = 64
169 - 64 = 105
Square root of 105 = 10.247cm