Based on experimental data, the function t(x) = -3(x − 4)3 + 10 models the temperature of a special substance after being placed in a freezer for x minutes . the turning point of the graph marks the moment when the substance changes from a liquid to a solid. using complete sentences in your written answer, explain to your fellow scientists how to find the turning point of this function. hint: the turning point of the graph is similar to the vertex of a quadratic function.