Answer:
2) B. as x increases, y increases as well
3) C. Number of books owned and number of visits to the doctor's office in one year
4) D. The 90 minute lesson that cost $40
5) A. There is a strong correlation
Step-by-step explanation:
2) i am not 100%positive since there is no way to check my answer, but i believe it is "B. As x increases, y increases as well" because it highlights the correlation between x and y. 
(i already explained 3, 4, and 5 on another one :D)
 
        
             
        
        
        
Answer:
a is height 
b is length 
c is width 
Step-by-step explanation:
 
        
             
        
        
        
<span>Direct proof. A direct proof is a way of establishing the truth or falsehood of a given mathematical statement by a combination of established facts, usually axioms, lemmas and theorems. It assumes the hypothesis of a conjecture is true and then uses a series of logical deductions to prove that the conclusion as well.</span>
        
             
        
        
        
Answer:
(x-y)(x-y-3)
Step-by-step explanation:
(x-y)² - 3(x-y) 
take (x-y) common, 
(x-y)(x-y-3) 
 
        
             
        
        
        
Answer:
So any time you are multiplying something, you are making "groups of"
so 3 groups of 2 = 6, 4 groups of 3 = 12
But with decimals or fractions, because they are a value less than zero, the numbers become increasingly small instead of bigger, like standard multiplication.
So for example, 1 group of 1/2 = 1/2
2 groups of 1/4 = 1/2
and so on
hope this helps!