Answer:
90 is the answer
Step-by-step explanation:
P(10,2) = 
= 
= 
10x9
=90
100/(n-1)=4
100=4n-4
104=4n
26=n
So there are 26 scores
1/2+4/10 for example
in a decimal way: 1/2+4/10 = 0.5+0.4. add those two and it is 0.9
in a fraction: 1/2+4/10 = 5/10+4/10. add the numerators, which is 9, and you keep the denominator so it is 9/10
Since you do not want the variable y, you must eliminate 
Therefore, to eliminate it, you must have the opposite of it, making the answer 
The least square regression equation for the information provided is y = 9.72x - 40.776
<u>The general equation of a regression model can be expressed thus</u>:
Calculating slope, b :
- b = 0.81(177.6 / 14.8) = 9.72
<u>Plugging the values of b, y and x into the equation in other to calculate c</u> :
696 = 9.72(75.8) + c
696 = 736.776 + c
c = 696 - 736.776
c = - 40.776
Therefore, the linear regression model can be expressed as : y = 9.72x - 40.776
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