No there are 3 feet in a yard
        
                    
             
        
        
        
Answer: b
Explanation:
The line of best fit to a scattergram is obtained in linear regression analysis by minimizing the sum of the squared errors.
For example, in the diagram shown below, there are n data points in the scattergram.
The error for the i-th data point is 

.
The coefficients (a and b) for the line of best fit are determined using calculus, to minimize 

.
 
        
        
        
So u have-27, positive 36
        
             
        
        
        
Answer:
it will be 14.09 
Step-by-step explanation:
 
        
                    
             
        
        
        
<span>The <u>correct answer</u> is: 
A) 60% ± 18%. 
Explanation: 
In a confidence interval, the margin of error is given by z*(</span>σ/√n<span>), where </span>σ<span> is the standard deviation and n is the sample size. 
First we <u>find the value of z</u>: 
We want a 95% confidence level; 95% = 95/100 = 0.95. 
To find the z-score, we first subtract this from 1: 
1-0.95 = 0.05. 
Divide by 2: 
0.05/2 = 0.025. 
Subtract from 1 again: 
1-0.025 = 0.975. 
Using a z-table, we find this value in the middle of the table. The z-score that is associated with this value is 1.96. 
Back to our formula for margin of error, we have 1.96(</span>σ<span>/</span>√n<span>). The larger n, the sample size, is, the larger its square root is. When we divide by a larger number, our answer is smaller; this gives us a smaller margin of error. 
This means that if we had a small sample size, we would divide by a smaller number, making our margin of error larger. The largest margin of error we have in this question is 18%, so this is our correct answer.</span>