Help please asap, will mark brainliest :)

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

What is the difference between the equations of a vertical and a horizontal line?

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52