Which graph represents the function?
x^2 - x - 2
Let's find the zeroes (where the function crosses the x axis)
(x - 2) ( x + 1) = 0
Set each factor to 0 and solve for x
x - 2 = 0 x + 1 = 0
x = 2 x = -1
Notice that the graph on the bottom left appears to be correct !!!!