In Exercises 7580, zoom in on a plot of at the point (a, (a)) and

In Exercises 75–80, zoom in on a plot of ƒ at the point (a, ƒ (a)) and state whether or not ƒ appears to be differentiable at x = a. If it is nondifferentiable, state whether the tangent line appears to be vertical or does not exist.

ƒ(x) = (x − 1)|x|, a = 0