Function f is a Function f is a quadratic function passing through the points (-4,0), (0,-12) and (3,0). Function g is modeled by the graph. Graph shows downward parabola plotted on a coordinate plane. The parabola has vertex at (minus 2, 9). The parabola has left slope at (minus 5, 0) and right slope at (1, 0). Over which interval are both functions negative?quadratic function passing through the points , and . Function g is modeled by the graph. Graph shows downward parabola plotted on a coordinate plane. The parabola has vertex at (minus 2, 9). The parabola has left slope at (minus 5, 0) and right slope at (1, 0). Over which interval are both functions negative?