Write the equation of the line that
Passes through (-9,4) and 10,-2)

The first thing we need to do is find the slope--the rise over run. We can find it by using the formula:

(y2 - y1) / (x2 - x1), that is we subtract the x an y values of our two points and then divide:

(-4 - -10) / (9 - 9)

(-4 + 10) / (9 - 9)

6 / 0

We cannot divide by 0. Our slope is essentially infinity, or a straight line up and down. This means we take a look at the x-coordinate: 9. This means our equation is:

x = 9

because no matter what we use for y, x will always stay at 9

Step-by-step explanation:

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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.