Use a calculator to graph the function over the interval [a, b] and graph the secant line from a to b. Use the calculator to estimate all values of c as guaranteed by the Mean Value Theorem. Then, find the exact value of c, if possible, or use a calculator to estimate to four digits. (Enter your answers as a comma-separated list. If the Mean Value Theorem does not apply, enter DNE.) y = 1x2 + 2x - 2| over [-3, 0]