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Lapatulllka [165]
2 years ago
6

Can somebidy give me examples of domain and range?

Mathematics
2 answers:
puteri [66]2 years ago
6 0

Domain = all possible x values

Range = all possible y values

example = Domain: {0, 5), Range: (5,10)

stepladder [879]2 years ago
5 0

Answer:


Step-by-step explanation:

Take a look at the function f(x) = √(x-1).  The input to the square root function MUST be ≥ 0.  Write and solve the inequality x-1 ≥ 0:  

Adding 1 to both sides, we get x ≥ 1, or [1,infinity).  This is the domain, the set of numbers for which f(x) is defined.

The smallest value that f(x) = √(x-1) can take on is 0 (at x=1).  Thus, the range is y≥0. or [0,infinity).  The range is the set of all possible output values of the function with which we are concerned.

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What is the y-intercept of the quadratic function f(x) = (x – 8)(x + 3)? (8,0) (0,3) (0,–24) (–5,0)
DiKsa [7]
The correct answer is:  [C]:  " (0, 24) " .
___________________________________________________________

Explanation:
___________________________________________________________

Given the quadratic function:
___________________________________________________________

          →  "  y = (x <span>− 8) (x + 3) "  ;   </span>←  Note:  Replace the "f(x)" with: "y" ; 

→  Find the "y-intercept".
___________________________________________________________

→  Note:  The "y-intercept" is the coordinate of the point(s) of the graph of the equation at which the graph crosses the "x-axis" when "x = 0" . 

   → So;  we set plug in "0" for "x" into our equation; and solve for "y" ; 

          → " y = (x − 8) (x + 3) " ;

          →   y = (0 − 8) (0 + 3)  ; 

          →   y = (-8) * (3)  ;  
 
          →   y = - 24 ; 
___________________________________________________________

So, the "y -intercept" of the <em><u>given</u></em> quadratic function is:
 
the point at which:  "x = 0 ; y = -24 " ;

      →  that is; the point  the coordinates:  " (0, - 24) " ;
___________________________________________________________
  →  which is:  Answer choice:  [C]:  " (0, - 24) " .
___________________________________________________________
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