The scatterplot shows the time that movers spent packing large boxes for a custom

which statement about the scatterplot is true?
the point (2, 10) shows that there is no relationship between the packing time and the number of boxes.
although (2, 10) is an extreme value, it should be part of the description of the relationship between packing time and number of boxes.
including the point (2, 10) could cause the description of the data set to be understated.
including the point (2, 10) could cause the description of the data set to be overstated.

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.