A researcher wants to find out if there is a relationship between the hours of TV a person watches per day and their grades. He observes 10 students and finds the following results: What does r equal? What is the strength?

3; 9 is 8 to -4

step-by-step explanation:

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.

-2/

r = 78539458390583095803458309458039485093485 or just 3

step-by-step explanation: