Write true if the statement is correct and false if otherwise.

1. The value of a in the quadratic equation determines the opening of the graph.
2. If a in the quadratic equation is negative, the graph opens upward.
3. Parabola is the graph of a quadratic equation.
4. The relationship of time and distance is a direct variation.
5. The relationship of the heat and aniount of water in a pot is a direct variation.​