Definition 1: A relation is any subset of a Cartesian product. For instance, a subset of 
, called a "binary relation from A to B," is a collection of ordered pairs (a,b) with first components from A and second components from B, and, in particular, a subset of 
is called a "relation on A."
Definition 2: A function is a relation that associates each element x of a set X to a single element y of another set Y (possibly the same set). A function is uniquely represented by its graph which is the set of all ordered pairs (x, f (x)).
From these definitions you can see that every function is a relation from X to Y, but not via versa (because you can consider relation 
- here for one x exist two y).
Answer: Correct choice is B.
Answer:
C
Step-by-step explanation:
x = -1 and -7
Answer:
Last equation given in the list of possible answers:
5 ( 1.5 + 1.5 + x ) = 25
Step-by-step explanation:
We need to include in the total addition of miles ridden during the week:
a) 1.5 miles to the school
b) 1.5 miles from school back home
c) x miles for the evening ride
so for the miles ridden per day we have: "1.5 +1.5 + x"
Now, since per week she does 5 days like this, then we need to multiply the expression above by 5 in order to total the number of miles she rides weekly (25 miles)
5 ( 1.5 + 1.5 + x ) = 25
And we can use this equation to find the amount "x" that Rin rides in the evening.
Three ratios that represent the number of red cars to blue cars are
2 : 3
6 : 9
8 : 12
<h3>Further explanation</h3>
<u>Given:</u>
Number of Red Cars = 4
Number of Blue Cars = 6
<u>Asked:</u>
Ratio = ?
<u>Solution:</u>
<em>Let:</em>
<em>Number of Red Cars = R</em>
<em>Number of Blue Cars = B</em>
The ratio that represent the number of red cars to blue cars is :
We can find other ratio by dividing or multiplying the above comparison with the same number :
<h3>Conclusion:</h3>
Three ratios that represent the number of red cars to blue cars are:
<h3>Learn more</h3>
<h3>Answer details</h3>
Grade: College
Subject: Mathematics
Chapter: Ratio
Keywords: Lower , Common , Multiple , Highest , Ratio , Proper , Jar , Pickles , Patties , Buns
