find f(-1) if (x)= x2 - 6x/ x plus 2 and which equation is linear x=-2 ,y =3x2 plus1 ,y= x-2 , y2=1/2 x plus 3
y = x-2 is a linear equation, but x = -2 is also a straight line on a graph.
If your f(x) = x^2 -6x/(x+2), then to get f(-1), substitute -1 for x and do the calculation.
The square of -1 is 1. Finish the rest of it.