How do you find f(8) in (8,-2), (-5,8), (5,3)}

f(8)=-2

Step-by-step explanation:

Let

x > the independent variable or input value

f(x) ---> the dependent variable or output value

we know that

f(8) > Is the value of the function f(x) when the value of x is equal to 8

Verify each case

1) (8,-2)

That means

For x=8

The value of the function is equal to -2

so

f(8)=-2

2) (-5,8)

That means

For x=-5

The value of the function is equal to 8

so

f(-5)=8

3) (5,3)

That means

For x=5

The value of the function is equal to 3

so

f(5)=3

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

the answer is y = 11.54

hope this : )