Question 61132
y=x squared-2x-9. Graph

y = x^2 -2x - 9


first of all give values for x like o, 1, -1, 2, -2 etc.

when x = o, we have y= 0^2 -2*0-9
                     = 0 -0 -9
                     = -9

when x=1   we have  y= 1^2 -2*1 -9
                     = 1 -2 -9
                     = -10
 

when x =-1 ,  y =  (-1^ -1) - (2* -1) -9   
                = +1 -(-2) -9
                = +1 +2 -9
                = -6

 similarly 

when x =2,  we have  y= -9
and when x = -2, we have y = -1 


Now we have the values like this,

(x,y)

(0,-9)

(1,-10)

(-1,-6)

(2,-9)

(-2,-1)

Now plot these points in the graph.
 
      
{{{ graph( 400, 300, -5, 5, -15, 10, x^2-2x-9) }}}