The table compares x, the number of minutes of television sam watched each day, to y, the number of minutes she spent exercising. the function y = –0.78x + 95 models the data in the table. which is the best prediction for the number of minutes of exercising sam will do if she spends 30 minutes watching television that day? 45 minutes 72 minutes 83 minutes 118 minutes

"The function y = –0.78x + 95 models the data in the table. Which is the best prediction for the number of minutes of exercising Sam will do if she spends 30 minutes watching television that day?"

Just substitute 30 for x in the given function: f(30)= -0.78(30)+ 95.

71.6. She will exercise for about 72 minues on that day.

2/5

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.