Peter is an artist, and he charges for his paintings on an hourly basis. He also receives tips from many of his clients. The scatter plot below shows the number of hours Peter
worked on a painting and the amount of money he received from his client. A line of
best fit for these data points, the equation y=85x+20, is also shown on the plot.
Amount Paid vs. Hours Worked
300+
400+
300+
Amount Paid (dollars
200+
100+
S
6
3 4
Hours Worked
On average, how many more dollars does a client pay for a painting that takes 4 hours
than a painting that takes 3 hours?

ur mom gae no homo

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.