Desmos Graphing Calculator Link Consider the function f(x) - 12x + 30x - 160x + 2. f(ac) has inflection points at (reading from left to right) x = D, E, and F where D is and E is and F is For each of the following intervals, tell whether f(x ) is concave up or concave down. (= 0, D): Select an answer v (D, E): Select an answer (E, F): Select an answer v (F, co): Select an answer v Question Help: [ Video D Post to forum Submit Question Jump to Answer hp X N O W O P