the function f ( I )= -2x +5 312 - 4x + 1 Is f(I) continuous on the real number line? Justify your answer. (Hint: Think about where f(r) might be discontinuous and check to see if it actually is. Show all three steps to check for continuity for full credit. Draw a small picture of anything you like on the bottom of the front page for 3 points extra credit)