Answer:
b
Step-by-step explanation:
 
        
             
        
        
        
Standard error (SE)

Or

 Therefore, SE of the mean = (8)/(2) =4
 
        
        
        
Answer:
f(x) = y + (x*p)
Step-by-step explanation:
Since we are not given actual values we will need to make the function with only variables. Each variable will represent the following...
Fixed Cost: y
Cost per charm: p
Number of charms: x
Therefore, using the variables mentioned above we can combine them into the following linear function using the number of charms as our main input for our function...
f(x) = y + (x*p)
 
        
             
        
        
        
Answer: Yes it is reasonable.
Step-by-step explanation: 
If all the numbers are rounded, 79 will be rounded to 80
12 to 10
and 11 to 10
If there are about 80 kids in 3rd grade, and about 20 kids in Mrs. Henry's class (because 10 girls plus 10 boys)
That means that 80-20
about 60 kids are not in Mrs. Henry's class
Hope this helped!
 
        
                    
             
        
        
        
Look for the y-intercept
since we know the slope is 3 we just going to plug in 
-5=3(1)+y
-5-3=y
so the y-intercept is 8 now you can find the equation
y=3x-8