#3 is not a function because there are two answers for one out put
#4 is a function because it is a straight line
 
        
             
        
        
        
Answer:
 a. Fred's margin of error is larger than Ted's. 
Step-by-step explanation:
Margin of error of a confidence interval:

In which z is related to the confidence level(the higher the confidence level the larger the value of z)  is the standard deviation of the population and n is the size of the sample.
 is the standard deviation of the population and n is the size of the sample.
From this, we have that:
A higher confidence level leads to a larger margin of error.
A larger sample size leads to a smaller margin of error.
In this question:
Same confidence level.
Fred's sample is smaller, so his margin of error will be larger.
The correct answer is given by option a.
 
        
             
        
        
        
Answer:
SteelSeries arcits pro wireless 
Step-by-step explanation:
 
        
                    
             
        
        
        
3p+2h=195
p + 15 = h
3p + 2(p + 15) = 195
3p + 2p + 30 = 195
5p = 165 (combine like terms and isolate your variable)
p = 33
33 + 15 = 48 (plug 33 into your original second equation)
ANSWER: 33 pretzels and 48 hotdogs
**You can plug these into your original (first) equation to check your answer