Of the piecewise below, (a) find the right and left hand limit of f at x= -1. (b) Is f continuous at x= -1? Explain.

No program, meaning using a program graphing

Someone else's computer, who I may not download things onto. Though, the function is straightforward.

1, x < or = to -1

-x, -1 < x < 0

1, x= 0

-x, 0 < x < 1

1, x > or = to 1

Thought:

(a) right: -1

left: -1

(b) I think so. Even though there are two points of discontinuity, they are removable points.

For extra help, how does one get rid of removable points of discontinuity?

Thanks!