Use the definition of continuity to determine whether f(x) is continuous at a. a. f(x) = 2x + 5 at a = 1 f (x) is Select an answer v because Select an answer 4 b. f(x) = at a = 3 c - 2 f(x) is Select an answer v because Select an answer v C +5 C. f(x) = - at a = 5 C- 5 f(x) is Select an answer v | because Select an answer V