Answer:
first one: function
second one: not a function
third one: not a function
fourth one: not a function
Step-by-step explanation:
it is never a function if two of the x inputs are the same or if one x input has two y outputs..
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Y = -x - 3 bc the y intercept is -3 and the graph goes down by negative one
Answer:
Solution: 
,
Step-by-step explanation:
Given:
The rational equation to solve is given as:
Doing cross product, we get:
Now, for , the rational equation is equal to 0. So, is a solution.
Also, is also a solution.
So, no extraneous solution.
Any value that is less than 3 but not equal to 3
Answer:
True
Step-by-step explanation:
In regression analysis, it tries to infer that there is a supposed relationship between two or more variables.
Now it has a couple of functions such as;
It allows us to directly estimate the parameters in linear functions only, although there are some other ways in which it would allow many non - linear functional forms to get estimated indirectly.
Regression also allows us to test and find out if there is a functional relationship between two or more variables. This is done by testing the hypothesis whether each of the slopes have a value of zero.
Thus, from the definitions given, we can see that regression is a basically a functional relationship between two or more variables, where one or more variables are used to predict a single variable of interest.
Thus, the given statement is true.
