During an annual end-of-year performance review, a team of realtors reported the number of homes sold that year. The histogram shows those sales results. Which of the following statements are true about the home sales data set represented by this histogram? Select all that apply.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

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.