Please help me in this worksheet it’s really important

Explain why the function is discontinuous at the given number a. (select all that apply.) f(x) = 1 x + 1 a = −1 f(−1) is undefined. lim x→−1+ f(x) and lim x→−1− f(x) exist, but are not equal. lim x→−1 f(x) does not exist. f(−1) and lim x→−1 f(x) exist, but are not equal. none of the above

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?